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Physics

| 🗖 nosplit | ↑ parent "Natural science" | words: 276 | descendant words: 39k | descendants: 680

🗖 nosplit | ⇓ toc | ↑ parent "Natural science" | Wikipedia | words: 276 | descendant words: 39k | descendants: 680

Physics is the art of predicting the future by modelling the world with mathematics.

Ciro Santilli doesn't know physics. He writes about it partly to start playing with some scientific content for: Write free books to get famous website, partly because this stuff is just amazingly beautiful.

Ciro's main intellectual physics fetishes are to learn quantum electrodynamics (understanding the point of Lie groups being a subpart of that) and condensed matter physics.

Every science is Physics in disguise, but the number of objects in the real world is so large that we can't solve the real equations in practice.

Luckily, due to emergence, we can use uglier higher level approximations of the world to solve many problems, with the complex limits of applicability of those approximations.

Therefore, such higher level approximations are highly specialized, and given different names such as:

As of 2019, all known physics can be described by two theories:

the Standard Model
general relativity

Unifying those two into the theory of everything one of the major goals of modern physics.

Figure 47. xkcd 435: Fields arranged by purity. Source.

Table of contents | 276, 39k, 680
- 1. How to teach and learn physics | 300 | 🔗 link | 🗖 nosplit | ↑ parent "Physics"
- 2. The most important physics experiments | 43, 1k, 7 | 🔗 link | 🗖 nosplit | ↑ parent "Physics"
  - 2.1. Aharonov–Bohm effect | 70 | 🔗 link | 🗖 nosplit | ↑ parent "The most important physics experiments"
  - 2.2. Michelson-Morley experiment | 68, 88, 1 | 🔗 link | 🗖 nosplit | ↑ parent "The most important physics experiments"
    - 2.2.1. Davisson-Germer experiment | 20 | 🔗 link | 🗖 nosplit | ↑ parent "Michelson-Morley experiment"
  - 2.3. Compton scattering | 122 | 🔗 link | 🗖 nosplit | ↑ parent "The most important physics experiments"
  - 2.4. Photoelectric effect | 56 | 🔗 link | 🗖 nosplit | ↑ parent "The most important physics experiments"
  - 2.5. Lamb shift | 516, 817, 1 | 🔗 link | 🗖 nosplit | ↑ parent "The most important physics experiments"
    - 2.5.1. Lamb-Retherford experiment (1947) | 301 | 🔗 link | 🗖 nosplit | ↑ parent "Lamb shift"
- 3. International System of Units (SI) | 47, 750, 26 | 🔗 link | 🗖 nosplit | ↑ parent "Physics"
  - 3.1. Origins of Precision by Machine Thinking (2017) | 26 | 🔗 link | 🗖 nosplit | ↑ parent "International System of Units"
  - 3.2. Versions of the international System of Units | 0, 0, 1 | 🔗 link | 🗖 nosplit | ↑ parent "International System of Units"
    - 3.2.1. 2019 redefinition of the SI base units | 🔗 link | 🗖 nosplit | ↑ parent "Versions of the international System of Units"
  - 3.3. Ampere in the 2019 redefinition of the SI base units | 143 | 🔗 link | 🗖 nosplit | ↑ parent "International System of Units"
  - 3.4. Ampere | 20 | 🔗 link | 🗖 nosplit | ↑ parent "International System of Units"
  - 3.5. Kilogram | 47, 52, 1 | 🔗 link | 🗖 nosplit | ↑ parent "International System of Units"
    - 3.5.1. Kibble balance | 5 | 🔗 link | 🗖 nosplit | ↑ parent "Kilogram"
  - 3.6. Time | 0, 429, 11 | 🔗 link | 🗖 nosplit | ↑ parent "International System of Units"
    - 3.6.1. Frequency | 0, 20, 3 | 🔗 link | 🗖 nosplit | ↑ parent "Time"
      - 3.6.1.1. Period (physics) | 🔗 link | 🗖 nosplit | ↑ parent "Frequency"
      - 3.6.1.2. Hertz (Hz) | 0, 20, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Frequency"
        
        3.6.1.2.1. Megahertz (MHz) | 20 | 🔗 link | 🗖 nosplit | ↑ parent "Hertz"
    - 3.6.2. Clock | 0, 409, 3 | 🔗 link | 🗖 nosplit | ↑ parent "Time"
      - 3.6.2.1. Quartz clock | 124 | 🔗 link | 🗖 nosplit | ↑ parent "Clock"
      - 3.6.2.2. Atomic clock | 198, 285, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Clock"
        
        3.6.2.2.1. Caesium standard (1967) | 87 | 🔗 link | 🗖 nosplit | ↑ parent "Atomic clock"
    - 3.6.3. Unit of time | 0, 0, 2 | 🔗 link | 🗖 nosplit | ↑ parent "Time"
      - 3.6.3.1. Second (s) | 🔗 link | 🗖 nosplit | ↑ parent "Unit of time"
      - 3.6.3.2. Year (y) | 🔗 link | 🗖 nosplit | ↑ parent "Unit of time"
  - 3.7. Length | 0, 11, 3 | 🔗 link | 🗖 nosplit | ↑ parent "International System of Units"
    - 3.7.1. Meter | 🔗 link | 🗖 nosplit | ↑ parent "Length"
    - 3.7.2. Nanometer | 🔗 link | 🗖 nosplit | ↑ parent "Length"
    - 3.7.3. Gauge block | 11 | 🔗 link | 🗖 nosplit | ↑ parent "Length"
  - 3.8. Geiger counter | 🔗 link | 🗖 nosplit | ↑ parent "International System of Units"
  - 3.9. Natural units | 22, 22, 1 | 🔗 link | 🗖 nosplit | ↑ parent "International System of Units"
    - 3.9.1. Planck units | 🔗 link | 🗖 nosplit | ↑ parent "Natural units"
- 4. Particle physics | 137, 28k, 449 | 🔗 link | 🗖 nosplit | ↑ parent "Physics"
  - 4.1. Standard Model | 94, 4k, 80 | 🔗 link | 🗖 nosplit | ↑ parent "Particle physics"
    - 4.1.1. Theory of everything (TOE) | 140, 204, 3 | 🔗 link | 🗖 nosplit | ↑ parent "Standard Model"
    - 4.1.2. Subatomic particle | 0, 3k, 74 | 🔗 link | 🗖 nosplit | ↑ parent "Standard Model"
      - 4.1.2.1. Elementary particle | 15, 3k, 62 | 🔗 link | 🗖 nosplit | ↑ parent "Subatomic particle"
        
        4.1.2.1.1. Are there more than 3 generations of particles in the Standard Model? | 51 | 🔗 link | 🗖 nosplit | ↑ parent "Elementary particle"
        
        4.1.2.1.2. Photon | 138, 2k, 50 | 🔗 link | 🗖 nosplit | ↑ parent "Elementary particle"
        
        4.1.2.1.2.1. Light | 0, 318, 12 | 🔗 link | 🗖 nosplit | ↑ parent "Photon"
        
        4.1.2.1.2.1.1. Radio | 0, 0, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Light"
        
        4.1.2.1.2.1.1.1. Radar | 🔗 link | 🗖 nosplit | ↑ parent "Radio"
        
        4.1.2.1.2.1.2. Speed of light | 9, 287, 4 | 🔗 link | 🗖 nosplit | ↑ parent "Light"
        
        4.1.2.1.2.1.2.1. Speed of light experiments | 90 | 🔗 link | 🗖 nosplit | ↑ parent "Speed of light"
        
        4.1.2.1.2.1.2.2. Faster-than-light (FTL) | 188, 188, 2 | 🔗 link | 🗖 nosplit | ↑ parent "Speed of light"
        
        4.1.2.1.2.1.2.2.1. Tachyon | 🔗 link | 🗖 nosplit | ↑ parent "Faster-than-light"
        
        4.1.2.1.2.1.2.2.2. Tachyonic antitelephone | 🔗 link | 🗖 nosplit | ↑ parent "Faster-than-light"
        
        4.1.2.1.2.1.3. Electromagnetic spectrum | 0, 31, 4 | 🔗 link | 🗖 nosplit | ↑ parent "Light"
        
        4.1.2.1.2.1.3.1. Microwave (3 mm to 0.3 m) | 13 | 🔗 link | 🗖 nosplit | ↑ parent "Electromagnetic spectrum"
        
        4.1.2.1.2.1.3.2. Radio wave (3 mm to 0.3 m) | 4 | 🔗 link | 🗖 nosplit | ↑ parent "Electromagnetic spectrum"
        
        4.1.2.1.2.1.3.3. Visible spectrum (420-680 nm) | 14 | 🔗 link | 🗖 nosplit | ↑ parent "Electromagnetic spectrum"
        
        4.1.2.1.2.1.3.4. X-ray | 🔗 link | 🗖 nosplit | ↑ parent "Electromagnetic spectrum"
        
        4.1.2.1.2.2. Photon spin | 15 | 🔗 link | 🗖 nosplit | ↑ parent "Photon"
        
        4.1.2.1.2.3. Radiation pressure | 0, 37, 2 | 🔗 link | 🗖 nosplit | ↑ parent "Photon"
        
        4.1.2.1.2.3.1. Nichols radiometer | 9 | 🔗 link | 🗖 nosplit | ↑ parent "Radiation pressure"
        
        4.1.2.1.2.3.2. Solar sail | 28 | 🔗 link | 🗖 nosplit | ↑ parent "Radiation pressure"
        
        4.1.2.1.2.4. Single photon production and detection experiments | 166, 878, 5 | 🔗 link | 🗖 nosplit | ↑ parent "Photon"
        
        4.1.2.1.2.4.1. Spontaneous parametric down-conversion (SPDC) | 380 | 🔗 link | 🗖 nosplit | ↑ parent "Single photon production and detection experiments"
        
        4.1.2.1.2.4.2. Two photon interference experiment | 244 | 🔗 link | 🗖 nosplit | ↑ parent "Single photon production and detection experiments"
        
        4.1.2.1.2.4.3. Photomultiplier | 0, 88, 2 | 🔗 link | 🗖 nosplit | ↑ parent "Single photon production and detection experiments"
        
        4.1.2.1.2.4.3.1. Photomultiplier tube | 56 | 🔗 link | 🗖 nosplit | ↑ parent "Photomultiplier"
        
        4.1.2.1.2.4.3.2. Silicon photomultiplier | 32 | 🔗 link | 🗖 nosplit | ↑ parent "Photomultiplier"
        
        4.1.2.1.2.5. Squeezed state of light | 16 | 🔗 link | 🗖 nosplit | ↑ parent "Photon"
        
        4.1.2.1.2.6. Optics | 43, 994, 23 | 🔗 link | 🗖 nosplit | ↑ parent "Photon"
        
        4.1.2.1.2.6.1. Beam splitter | 0, 0, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Optics"
        
        4.1.2.1.2.6.1.1. Half-silvered mirror | 🔗 link | 🗖 nosplit | ↑ parent "Beam splitter"
        
        4.1.2.1.2.6.2. Camera obscura | 🔗 link | 🗖 nosplit | ↑ parent "Optics"
        
        4.1.2.1.2.6.3. Collimator | 0, 52, 2 | 🔗 link | 🗖 nosplit | ↑ parent "Optics"
        
        4.1.2.1.2.6.3.1. Collimated beam | 0, 52, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Collimator"
        
        4.1.2.1.2.6.3.1.1. Parallel light | 52 | 🔗 link | 🗖 nosplit | ↑ parent "Collimated beam"
        
        4.1.2.1.2.6.4. Diffraction grating | 🔗 link | 🗖 nosplit | ↑ parent "Optics"
        
        4.1.2.1.2.6.5. Diaphragm (optics) | 🔗 link | 🗖 nosplit | ↑ parent "Optics"
        
        4.1.2.1.2.6.6. Lens | 16, 289, 2 | 🔗 link | 🗖 nosplit | ↑ parent "Optics"
        
        4.1.2.1.2.6.6.1. Biconvex spherical lens | 235, 273, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Lens"
        
        4.1.2.1.2.6.6.1.1. Focal length (f) | 38 | 🔗 link | 🗖 nosplit | ↑ parent "Biconvex spherical lens"
        
        4.1.2.1.2.6.7. Optical cavity | 🔗 link | 🗖 nosplit | ↑ parent "Optics"
        
        4.1.2.1.2.6.8. Point light source | 13 | 🔗 link | 🗖 nosplit | ↑ parent "Optics"
        
        4.1.2.1.2.6.9. Photonics | 30, 597, 9 | 🔗 link | 🗖 nosplit | ↑ parent "Optics"
        
        4.1.2.1.2.6.9.1. Photon polarization | 183, 221, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Photonics"
        
        4.1.2.1.2.6.9.1.1. Polarizer | 38 | 🔗 link | 🗖 nosplit | ↑ parent "Photon polarization"
        
        4.1.2.1.2.6.9.2. Poincare sphere | 90 | 🔗 link | 🗖 nosplit | ↑ parent "Photonics"
        
        4.1.2.1.2.6.9.3. Photonics equipment | 27, 256, 5 | 🔗 link | 🗖 nosplit | ↑ parent "Photonics"
        
        4.1.2.1.2.6.9.3.1. Interferometer | 0, 143, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Photonics equipment"
        
        4.1.2.1.2.6.9.3.1.1. Fabry–Pérot interferometer | 143 | 🔗 link | 🗖 nosplit | ↑ parent "Interferometer"
        
        4.1.2.1.2.6.9.3.2. Optical fibre | 41 | 🔗 link | 🗖 nosplit | ↑ parent "Photonics equipment"
        
        4.1.2.1.2.6.9.3.3. Optical table | 45 | 🔗 link | 🗖 nosplit | ↑ parent "Photonics equipment"
        
        4.1.2.1.2.6.9.3.4. Optical ring resonator | 🔗 link | 🗖 nosplit | ↑ parent "Photonics equipment"
        
        4.1.2.1.2.7. Fluorescence | 0, 29, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Photon"
        
        4.1.2.1.2.7.1. Fluorometer | 29 | 🔗 link | 🗖 nosplit | ↑ parent "Fluorescence"
        
        4.1.2.1.3. Lepton | 21, 363, 9 | 🔗 link | 🗖 nosplit | ↑ parent "Elementary particle"
        
        4.1.2.1.3.1. Electron | 11, 302, 5 | 🔗 link | 🗖 nosplit | ↑ parent "Lepton"
        
        4.1.2.1.3.1.1. Elementary charge | 34, 291, 2 | 🔗 link | 🗖 nosplit | ↑ parent "Electron"
        
        4.1.2.1.3.1.1.1. Why do the electron and the proton have the same charge except for the opposite signs? | 157 | 🔗 link | 🗖 nosplit | ↑ parent "Elementary charge"
        
        4.1.2.1.3.1.1.2. Oil drop experiment | 100 | 🔗 link | 🗖 nosplit | ↑ parent "Elementary charge"
        
        4.1.2.1.3.1.2. Electron rest mass | 🔗 link | 🗖 nosplit | ↑ parent "Electron"
        
        4.1.2.1.3.1.3. Positron (1932) | 🔗 link | 🗖 nosplit | ↑ parent "Electron"
        
        4.1.2.1.3.2. Muon (1936) | 🔗 link | 🗖 nosplit | ↑ parent "Lepton"
        
        4.1.2.1.3.3. Neutrino | 40, 40, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Lepton"
        
        4.1.2.1.3.3.1. Cowan-Reines neutrino experiment (1956) | 🔗 link | 🗖 nosplit | ↑ parent "Neutrino"
      - 4.1.2.2. Composite particle | 0, 351, 9 | 🔗 link | 🗖 nosplit | ↑ parent "Subatomic particle"
        
        4.1.2.2.1. Hadron | 0, 351, 8 | 🔗 link | 🗖 nosplit | ↑ parent "Composite particle"
        
        4.1.2.2.1.1. Baryon | 46, 194, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Hadron"
        
        4.1.2.2.1.1.1. Baryon vs meson vs lepton | 148 | 🔗 link | 🗖 nosplit | ↑ parent "Baryon"
        
        4.1.2.2.1.2. Neutron | 🔗 link | 🗖 nosplit | ↑ parent "Hadron"
        
        4.1.2.2.1.3. Proton | 0, 0, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Hadron"
        
        4.1.2.2.1.3.1. Proton-to-electron mass ratio | 🔗 link | 🗖 nosplit | ↑ parent "Proton"
        
        4.1.2.2.1.4. Meson | 59, 157, 2 | 🔗 link | 🗖 nosplit | ↑ parent "Hadron"
        
        4.1.2.2.1.4.1. Pion (1947) | 58 | 🔗 link | 🗖 nosplit | ↑ parent "Meson"
        
        4.1.2.2.1.4.2. Kaon | 40 | 🔗 link | 🗖 nosplit | ↑ parent "Meson"
      - 4.1.2.3. Eightfold way (physics) | 61 | 🔗 link | 🗖 nosplit | ↑ parent "Subatomic particle"
    - 4.1.3. Why do symmetries such as SU(3), SU(2) and U(1) matter in particle physics? | 441 | 🔗 link | 🗖 nosplit | ↑ parent "Standard Model"
  - 4.2. Maxwell's equations | 413, 1k, 26 | 🔗 link | 🗖 nosplit | ↑ parent "Particle physics"
    - 4.2.1. Lorentz force | 44 | 🔗 link | 🗖 nosplit | ↑ parent "Maxwell's equations"
    - 4.2.2. Explicit scalar form of the Maxwell's equations | 95, 245, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Maxwell's equations"
      - 4.2.2.1. Overdetermination of Maxwell's equations | 150 | 🔗 link | 🗖 nosplit | ↑ parent "Explicit scalar form of the Maxwell's equations"
    - 4.2.3. Coulomb's law | 87 | 🔗 link | 🗖 nosplit | ↑ parent "Maxwell's equations"
    - 4.2.4. Solutions of Maxwell's equations | 48, 149, 2 | 🔗 link | 🗖 nosplit | ↑ parent "Maxwell's equations"
      - 4.2.4.1. Dipole antenna | 🔗 link | 🗖 nosplit | ↑ parent "Solutions of Maxwell's equations"
      - 4.2.4.2. Maxwell's equations with pointlike particles | 101 | 🔗 link | 🗖 nosplit | ↑ parent "Solutions of Maxwell's equations"
    - 4.2.5. Maxwell's equations in 2D | 53 | 🔗 link | 🗖 nosplit | ↑ parent "Maxwell's equations"
    - 4.2.6. Existence and uniqueness of solutions to Maxwell's equations | 31 | 🔗 link | 🗖 nosplit | ↑ parent "Maxwell's equations"
    - 4.2.7. Electric field ( $E$ ) | 0, 109, 6 | 🔗 link | 🗖 nosplit | ↑ parent "Maxwell's equations"
      - 4.2.7.1. Electric charge | 0, 84, 2 | 🔗 link | 🗖 nosplit | ↑ parent "Electric field"
        
        4.2.7.1.1. Charge conservation | 🔗 link | 🗖 nosplit | ↑ parent "Electric charge"
        
        4.2.7.1.2. Electric current | 84 | 🔗 link | 🗖 nosplit | ↑ parent "Electric charge"
      - 4.2.7.2. Electric potential ( $ϕ$ ) | 0, 25, 2 | 🔗 link | 🗖 nosplit | ↑ parent "Electric field"
        
        4.2.7.2.1. Volt (V) | 0, 25, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Electric potential"
        
        4.2.7.2.1.1. Electronvolt | 25 | 🔗 link | 🗖 nosplit | ↑ parent "Volt"
    - 4.2.8. Magnetic field ( $B$ ) | 0, 16, 2 | 🔗 link | 🗖 nosplit | ↑ parent "Maxwell's equations"
      - 4.2.8.1. Magnetometer | 16 | 🔗 link | 🗖 nosplit | ↑ parent "Magnetic field"
      - 4.2.8.2. Magnetic vector potential ( $A$ ) | 🔗 link | 🗖 nosplit | ↑ parent "Magnetic field"
    - 4.2.9. Hall effect | 73 | 🔗 link | 🗖 nosplit | ↑ parent "Maxwell's equations"
    - 4.2.10. Electromagnetic four-potential | 49, 120, 3 | 🔗 link | 🗖 nosplit | ↑ parent "Maxwell's equations"
    - 4.2.11. Electromagnetism | 12, 12, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Maxwell's equations"
      - 4.2.11.1. Magnetism | 🔗 link | 🗖 nosplit | ↑ parent "Electromagnetism"
  - 4.3. Theory of relativity | 0, 3k, 40 | 🔗 link | 🗖 nosplit | ↑ parent "Particle physics"
    - 4.3.1. Special relativity | 260, 3k, 34 | 🔗 link | 🗖 nosplit | ↑ parent "Theory of relativity"
      - 4.3.1.1. Einstein notation (Einstein summation convention) | 56 | 🔗 link | 🗖 nosplit | ↑ parent "Special relativity"
      - 4.3.1.2. Einstein synchronization | 0, 0, 2 | 🔗 link | 🗖 nosplit | ↑ parent "Special relativity"
        
        4.3.1.2.1. Frame of reference | 0, 0, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Einstein synchronization"
        
        4.3.1.2.1.1. Inertial frame of reference | 🔗 link | 🗖 nosplit | ↑ parent "Frame of reference"
      - 4.3.1.3. Lorentz transformation | 228, 1k, 9 | 🔗 link | 🗖 nosplit | ↑ parent "Special relativity"
        
        4.3.1.3.1. Lorentz covariance | 0, 12, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Lorentz transformation"
        
        4.3.1.3.1.1. Lorentz invariant | 12 | 🔗 link | 🗖 nosplit | ↑ parent "Lorentz covariance"
        
        4.3.1.3.2. Lorentz transform consequence: everyone sees the same speed of light | 313 | 🔗 link | 🗖 nosplit | ↑ parent "Lorentz transformation"
        
        4.3.1.3.3. Length contraction | 373, 409, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Lorentz transformation"
        
        4.3.1.3.3.1. Terrell rotation | 36 | 🔗 link | 🗖 nosplit | ↑ parent "Length contraction"
        
        4.3.1.3.4. Time dilation | 20, 241, 2 | 🔗 link | 🗖 nosplit | ↑ parent "Lorentz transformation"
        
        4.3.1.3.4.1. Transversal time dilation | 221 | 🔗 link | 🗖 nosplit | ↑ parent "Time dilation"
        
        4.3.1.3.4.2. Transverse Doppler effect | 🔗 link | 🗖 nosplit | ↑ parent "Time dilation"
        
        4.3.1.3.5. Twin paradox | 293 | 🔗 link | 🗖 nosplit | ↑ parent "Lorentz transformation"
      - 4.3.1.4. Maxwell's equations require special relativity | 144, 389, 5 | 🔗 link | 🗖 nosplit | ↑ parent "Special relativity"
        
        4.3.1.4.1. Charged particle moving at the same speed of electrons thought experiment | 192 | 🔗 link | 🗖 nosplit | ↑ parent "Maxwell's equations require special relativity"
        
        4.3.1.4.2. Covariant formulation of classical electromagnetism | 0, 53, 3 | 🔗 link | 🗖 nosplit | ↑ parent "Maxwell's equations require special relativity"
        
        4.3.1.4.2.1. Maxwell's equations are Lorentz invariant | 4 | 🔗 link | 🗖 nosplit | ↑ parent "Covariant formulation of classical electromagnetism"
        
        4.3.1.4.2.2. Maxwell's equations imply that the speed of light is the same for all inertial reference frames | 16 | 🔗 link | 🗖 nosplit | ↑ parent "Covariant formulation of classical electromagnetism"
        
        4.3.1.4.2.3. Maxwell Lagrangian | 33 | 🔗 link | 🗖 nosplit | ↑ parent "Covariant formulation of classical electromagnetism"
      - 4.3.1.5. Spacetime | 0, 402, 7 | 🔗 link | 🗖 nosplit | ↑ parent "Special relativity"
        
        4.3.1.5.1. Four-vector | 🔗 link | 🗖 nosplit | ↑ parent "Spacetime"
        
        4.3.1.5.2. Four-gradient | 38 | 🔗 link | 🗖 nosplit | ↑ parent "Spacetime"
        
        4.3.1.5.3. Minkowski space | 🔗 link | 🗖 nosplit | ↑ parent "Spacetime"
        
        4.3.1.5.4. Spacetime diagram | 60, 364, 3 | 🔗 link | 🗖 nosplit | ↑ parent "Spacetime"
        
        4.3.1.5.4.1. Light cone | 199, 304, 2 | 🔗 link | 🗖 nosplit | ↑ parent "Spacetime diagram"
        
        4.3.1.5.4.1.1. Timelike-separated event | 10 | 🔗 link | 🗖 nosplit | ↑ parent "Light cone"
        
        4.3.1.5.4.1.2. Spacelike-separated event | 95 | 🔗 link | 🗖 nosplit | ↑ parent "Light cone"
      - 4.3.1.6. Relativistic mechanics | 0, 116, 5 | 🔗 link | 🗖 nosplit | ↑ parent "Special relativity"
        
        4.3.1.6.1. Four-momentum | 0, 116, 4 | 🔗 link | 🗖 nosplit | ↑ parent "Relativistic mechanics"
        
        4.3.1.6.1.1. Relativistic energy | 0, 0, 2 | 🔗 link | 🗖 nosplit | ↑ parent "Four-momentum"
        
        4.3.1.6.1.1.1. Energy-momentum relation | 🔗 link | 🗖 nosplit | ↑ parent "Relativistic energy"
        
        4.3.1.6.1.1.2. Mass-energy equivalence ( $E = m c^{2}$ ) | 🔗 link | 🗖 nosplit | ↑ parent "Relativistic energy"
        
        4.3.1.6.1.2. Spacetime interval | 116 | 🔗 link | 🗖 nosplit | ↑ parent "Four-momentum"
    - 4.3.2. General relativity | 45, 89, 4 | 🔗 link | 🗖 nosplit | ↑ parent "Theory of relativity"
      - 4.3.2.1. Why gravity is not a force? | 18 | 🔗 link | 🗖 nosplit | ↑ parent "General relativity"
      - 4.3.2.2. Gravity | 26, 26, 2 | 🔗 link | 🗖 nosplit | ↑ parent "General relativity"
        
        4.3.2.2.1. Experiments that measure the gravitational constant | 0, 0, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Gravity"
        
        4.3.2.2.1.1. Cavendish experiment | 🔗 link | 🗖 nosplit | ↑ parent "Experiments that measure the gravitational constant"
  - 4.4. Applications of particle physics | 28 | 🔗 link | 🗖 nosplit | ↑ parent "Particle physics"
  - 4.5. Quantum mechanics | 170, 18k, 245 | 🔗 link | 🗖 nosplit | ↑ parent "Particle physics"
  - 4.6. Experimental particle physics | 0, 66, 7 | 🔗 link | 🗖 nosplit | ↑ parent "Particle physics"
    - 4.6.1. Cross section (physics) | 40, 40, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Experimental particle physics"
      - 4.6.1.1. Barn (unit) | 🔗 link | 🗖 nosplit | ↑ parent "Cross section"
    - 4.6.2. Particle detector | 0, 0, 2 | 🔗 link | 🗖 nosplit | ↑ parent "Experimental particle physics"
      - 4.6.2.1. Cloud chamber () | 🔗 link | 🗖 nosplit | ↑ parent "Particle detector"
      - 4.6.2.2. Bubble chamber | 🔗 link | 🗖 nosplit | ↑ parent "Particle detector"
    - 4.6.3. Particle accelerator | 0, 26, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Experimental particle physics"
      - 4.6.3.1. Synchrotron | 26 | 🔗 link | 🗖 nosplit | ↑ parent "Particle accelerator"
  - 4.7. Nuclear physics | 28, 1k, 33 | 🔗 link | 🗖 nosplit | ↑ parent "Particle physics"
    - 4.7.1. Atomic nucleus | 0, 18, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Nuclear physics"
      - 4.7.1.1. Nucleon | 18 | 🔗 link | 🗖 nosplit | ↑ parent "Atomic nucleus"
    - 4.7.2. Radioactive decay | 51, 535, 10 | 🔗 link | 🗖 nosplit | ↑ parent "Nuclear physics"
      - 4.7.2.1. Alpha decay | 158, 158, 4 | 🔗 link | 🗖 nosplit | ↑ parent "Radioactive decay"
        
        4.7.2.1.1. Cluster decay | 🔗 link | 🗖 nosplit | ↑ parent "Alpha decay"
        
        4.7.2.1.2. Spontaneous fission | 🔗 link | 🗖 nosplit | ↑ parent "Alpha decay"
        
        4.7.2.1.3. Alpha particle | 0, 0, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Alpha decay"
        
        4.7.2.1.3.1. Geiger-Nuttall law | 🔗 link | 🗖 nosplit | ↑ parent "Alpha particle"
      - 4.7.2.2. Beta decay | 101 | 🔗 link | 🗖 nosplit | ↑ parent "Radioactive decay"
      - 4.7.2.3. Gamma ray | 217, 217, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Radioactive decay"
        
        4.7.2.3.1. Nuclear isomer | 🔗 link | 🗖 nosplit | ↑ parent "Gamma ray"
      - 4.7.2.4. Decay scheme | 8 | 🔗 link | 🗖 nosplit | ↑ parent "Radioactive decay"
      - 4.7.2.5. Half-life | 🔗 link | 🗖 nosplit | ↑ parent "Radioactive decay"
    - 4.7.3. Isotope | 🔗 link | 🗖 nosplit | ↑ parent "Nuclear physics"
    - 4.7.4. Nuclear fission | 0, 4, 6 | 🔗 link | 🗖 nosplit | ↑ parent "Nuclear physics"
      - 4.7.4.1. Neutron temperature | 4, 4, 2 | 🔗 link | 🗖 nosplit | ↑ parent "Nuclear fission"
        
        4.7.4.1.1. Fast neutron | 🔗 link | 🗖 nosplit | ↑ parent "Neutron temperature"
        
        4.7.4.1.2. Slow neutron | 🔗 link | 🗖 nosplit | ↑ parent "Neutron temperature"
      - 4.7.4.2. Fissile material | 🔗 link | 🗖 nosplit | ↑ parent "Nuclear fission"
      - 4.7.4.3. Nuclear chain reaction | 0, 0, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Nuclear fission"
        
        4.7.4.3.1. Nuclear reactor | 🔗 link | 🗖 nosplit | ↑ parent "Nuclear chain reaction"
    - 4.7.5. Nuclear magnetic resonance | 0, 13, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Nuclear physics"
      - 4.7.5.1. Magnetic resonance imaging (MRI) | 13 | 🔗 link | 🗖 nosplit | ↑ parent "Nuclear magnetic resonance"
    - 4.7.6. Nuclear weapon | 213, 612, 9 | 🔗 link | 🗖 nosplit | ↑ parent "Nuclear physics"
      - 4.7.6.1. Fat Man | 21 | 🔗 link | 🗖 nosplit | ↑ parent "Nuclear weapon"
      - 4.7.6.2. Hanford site | 175, 214, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Nuclear weapon"
        
        4.7.6.2.1. B Reactor | 39 | 🔗 link | 🗖 nosplit | ↑ parent "Hanford site"
      - 4.7.6.3. Little Boy | 25 | 🔗 link | 🗖 nosplit | ↑ parent "Nuclear weapon"
      - 4.7.6.4. Manhattan Project | 0, 112, 3 | 🔗 link | 🗖 nosplit | ↑ parent "Nuclear weapon"
        
        4.7.6.4.1. Chicago Pile-1 (1942-12-02) | 11, 91, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Manhattan Project"
        
        4.7.6.4.1.1. Metallurgical Laboratory | 80 | 🔗 link | 🗖 nosplit | ↑ parent "Chicago Pile-1"
        
        4.7.6.4.2. Trinity (nuclear-test, 1945-07-16) | 21 | 🔗 link | 🗖 nosplit | ↑ parent "Manhattan Project"
      - 4.7.6.5. Multiple independently targetable reentry vehicle (MIRV) | 27 | 🔗 link | 🗖 nosplit | ↑ parent "Nuclear weapon"
  - 4.8. History of particle physics | 8 | 🔗 link | 🗖 nosplit | ↑ parent "Particle physics"
  - 4.9. Particle physics bibliography | 22, 634, 9 | 🔗 link | 🗖 nosplit | ↑ parent "Particle physics"
- 5. Energy | 0, 50, 3 | 🔗 link | 🗖 nosplit | ↑ parent "Physics"
  - 5.1. Joule (J) | 🔗 link | 🗖 nosplit | ↑ parent "Energy"
  - 5.2. Potential energy | 🔗 link | 🗖 nosplit | ↑ parent "Energy"
  - 5.3. Kinetic energy | 50 | 🔗 link | 🗖 nosplit | ↑ parent "Energy"
- 6. Field (physics) | 117 | 🔗 link | 🗖 nosplit | ↑ parent "Physics"
- 7. Law of physics | 🔗 link | 🗖 nosplit | ↑ parent "Physics"
- 8. History of physics | 10 | 🔗 link | 🗖 nosplit | ↑ parent "Physics"
- 9. Condensed matter physics | 25, 1k, 39 | 🔗 link | 🗖 nosplit | ↑ parent "Physics"
  - 9.1. Solid-state physics | 🔗 link | 🗖 nosplit | ↑ parent "Condensed matter physics"
  - 9.2. Condensed matter Physics bibliography | 22, 35, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Condensed matter physics"
    - 9.2.1. Course: Quantum Many-Body Physics in Condensed Matter by Luis Gregorio Dias (2020) | 13 | 🔗 link | 🗖 nosplit | ↑ parent "Condensed matter Physics bibliography"
  - 9.3. Electronic band theory | 32 | 🔗 link | 🗖 nosplit | ↑ parent "Condensed matter physics"
  - 9.4. Semiconductor | 16 | 🔗 link | 🗖 nosplit | ↑ parent "Condensed matter physics"
  - 9.5. Superconductivity | 255, 755, 16 | 🔗 link | 🗖 nosplit | ↑ parent "Condensed matter physics"
    - 9.5.1. Superconducting material | 0, 85, 5 | 🔗 link | 🗖 nosplit | ↑ parent "Superconductivity"
    - 9.5.2. Applications of superconductivity | 71 | 🔗 link | 🗖 nosplit | ↑ parent "Superconductivity"
    - 9.5.3. What is the IV curve of superconductors? | 5, 36, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Superconductivity"
      - 9.5.3.1. Do superconductors carry infinite current? | 31 | 🔗 link | 🗖 nosplit | ↑ parent "What is the IV curve of superconductors?"
    - 9.5.4. BCS Theory | 111 | 🔗 link | 🗖 nosplit | ↑ parent "Superconductivity"
    - 9.5.5. Josephson effect | 65, 197, 5 | 🔗 link | 🗖 nosplit | ↑ parent "Superconductivity"
      - 9.5.5.1. Josephson junction | 13 | 🔗 link | 🗖 nosplit | ↑ parent "Josephson effect"
      - 9.5.5.2. Magnetic flux quantum | 0, 12, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Josephson effect"
        
        9.5.5.2.1. Josephson constant | 12 | 🔗 link | 🗖 nosplit | ↑ parent "Magnetic flux quantum"
      - 9.5.5.3. Applications of Josephson Junctions | 69, 107, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Josephson effect"
        
        9.5.5.3.1. SQUID device | 38 | 🔗 link | 🗖 nosplit | ↑ parent "Applications of Josephson Junctions"
  - 9.6. Superconducting tunnel junction (STJ) | 88 | 🔗 link | 🗖 nosplit | ↑ parent "Condensed matter physics"
  - 9.7. Superfluidity | 69 | 🔗 link | 🗖 nosplit | ↑ parent "Condensed matter physics"
  - 9.8. Bose-Einstein condensate | 🔗 link | 🗖 nosplit | ↑ parent "Condensed matter physics"
  - 9.9. Materials science | 0, 84, 10 | 🔗 link | 🗖 nosplit | ↑ parent "Condensed matter physics"
    - 9.9.1. Density | 🔗 link | 🗖 nosplit | ↑ parent "Materials science"
    - 9.9.2. Metallurgy | 0, 0, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Materials science"
      - 9.9.2.1. Ingot | 🔗 link | 🗖 nosplit | ↑ parent "Metallurgy"
    - 9.9.3. Quantum dot | 0, 14, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Materials science"
      - 9.9.3.1. Quantum dot single photon source | 14 | 🔗 link | 🗖 nosplit | ↑ parent "Quantum dot"
    - 9.9.4. Magnet | 0, 70, 2 | 🔗 link | 🗖 nosplit | ↑ parent "Materials science"
      - 9.9.4.1. Ferromagnetism | 56 | 🔗 link | 🗖 nosplit | ↑ parent "Magnet"
      - 9.9.4.2. Ising model | 14 | 🔗 link | 🗖 nosplit | ↑ parent "Magnet"
    - 9.9.5. Piezoelectricity | 0, 0, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Materials science"
      - 9.9.5.1. Piezoelectric motor | 🔗 link | 🗖 nosplit | ↑ parent "Piezoelectricity"
  - 9.10. Laser | 74, 74, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Condensed matter physics"
    - 9.10.1. Population inversion | 🔗 link | 🗖 nosplit | ↑ parent "Laser"
  - 9.11. Quasiparticle | 🔗 link | 🗖 nosplit | ↑ parent "Condensed matter physics"
- 10. Thermodynamics | 0, 320, 10 | 🔗 link | 🗖 nosplit | ↑ parent "Physics"
  - 10.1. Entropy | 120 | 🔗 link | 🗖 nosplit | ↑ parent "Thermodynamics"
  - 10.2. Phase transition | 25, 96, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Thermodynamics"
    - 10.2.1. Second-order phase transition | 71 | 🔗 link | 🗖 nosplit | ↑ parent "Phase transition"
  - 10.3. Refrigerator | 0, 54, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Thermodynamics"
    - 10.3.1. Dilution refrigerator | 54 | 🔗 link | 🗖 nosplit | ↑ parent "Refrigerator"
  - 10.4. Temperature | 0, 0, 2 | 🔗 link | 🗖 nosplit | ↑ parent "Thermodynamics"
    - 10.4.1. Thermometer | 0, 0, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Temperature"
      - 10.4.1.1. Mercury-in-glass thermometer | 🔗 link | 🗖 nosplit | ↑ parent "Thermometer"
  - 10.5. Vacuum | 0, 50, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Thermodynamics"
    - 10.5.1. Vacuum engineering | 50 | 🔗 link | 🗖 nosplit | ↑ parent "Vacuum"
- 11. Mechanics | 14, 2k, 44 | 🔗 link | 🗖 nosplit | ↑ parent "Physics"
  - 11.1. Classical mechanics | 18 | 🔗 link | 🗖 nosplit | ↑ parent "Mechanics"
  - 11.2. Angular momentum | 0, 0, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Mechanics"
    - 11.2.1. Precession | 🔗 link | 🗖 nosplit | ↑ parent "Angular momentum"
  - 11.3. Axle | 🔗 link | 🗖 nosplit | ↑ parent "Mechanics"
  - 11.4. Newton's laws of motion | 0, 0, 2 | 🔗 link | 🗖 nosplit | ↑ parent "Mechanics"
    - 11.4.1. Force | 🔗 link | 🗖 nosplit | ↑ parent "Newton's laws of motion"
    - 11.4.2. Mass | 🔗 link | 🗖 nosplit | ↑ parent "Newton's laws of motion"
  - 11.5. Mechanics problems | 0, 105, 12 | 🔗 link | 🗖 nosplit | ↑ parent "Mechanics"
    - 11.5.1. Atwood machine | 0, 32, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Mechanics problems"
      - 11.5.1.1. Compound Atwood machine | 32 | 🔗 link | 🗖 nosplit | ↑ parent "Atwood machine"
    - 11.5.2. Elastic collision | 🔗 link | 🗖 nosplit | ↑ parent "Mechanics problems"
    - 11.5.3. Harmonic oscillator | 0, 4, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Mechanics problems"
      - 11.5.3.1. Coupled oscillators | 4 | 🔗 link | 🗖 nosplit | ↑ parent "Harmonic oscillator"
    - 11.5.4. Pendulum | 33, 33, 2 | 🔗 link | 🗖 nosplit | ↑ parent "Mechanics problems"
      - 11.5.4.1. Double pendulum | 🔗 link | 🗖 nosplit | ↑ parent "Pendulum"
      - 11.5.4.2. Spherical pendulum | 🔗 link | 🗖 nosplit | ↑ parent "Pendulum"
    - 11.5.5. Two-body problem | 19 | 🔗 link | 🗖 nosplit | ↑ parent "Mechanics problems"
    - 11.5.6. Continuous mechcanis problem | 0, 17, 2 | 🔗 link | 🗖 nosplit | ↑ parent "Mechanics problems"
      - 11.5.6.1. Mechanical resonance | 17, 17, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Continuous mechcanis problem"
        
        11.5.6.1.1. Tuning fork | 🔗 link | 🗖 nosplit | ↑ parent "Mechanical resonance"
  - 11.6. Fluid mechanics | 1, 22, 3 | 🔗 link | 🗖 nosplit | ↑ parent "Mechanics"
    - 11.6.1. Gravity wave | 🔗 link | 🗖 nosplit | ↑ parent "Fluid mechanics"
    - 11.6.2. Navier-Stokes equations | 0, 21, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Fluid mechanics"
      - 11.6.2.1. Navier-Stokes existence and smoothness | 21 | 🔗 link | 🗖 nosplit | ↑ parent "Navier-Stokes equations"
  - 11.7. Lagrangian mechanics | 907, 2k, 19 | 🔗 link | 🗖 nosplit | ↑ parent "Mechanics"
    - 11.7.1. Lagrangian mechanics lectures by Michel van Biezen (2017) | 60 | 🔗 link | 🗖 nosplit | ↑ parent "Lagrangian mechanics"
    - 11.7.2. Action (physics) | 0, 81, 3 | 🔗 link | 🗖 nosplit | ↑ parent "Lagrangian mechanics"
      - 11.7.2.1. Stationary action principle (Principle of least action) | 47, 81, 2 | 🔗 link | 🗖 nosplit | ↑ parent "Action"
        
        11.7.2.1.1. Euler-Lagrange equation | 0, 34, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Stationary action principle"
        
        11.7.2.1.1.1. Equations of motion | 34 | 🔗 link | 🗖 nosplit | ↑ parent "Euler-Lagrange equation"
    - 11.7.3. Lagrangian | 17, 434, 3 | 🔗 link | 🗖 nosplit | ↑ parent "Lagrangian mechanics"
      - 11.7.3.1. Lagrangian (field theory) | 9, 328, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Lagrangian"
        
        11.7.3.1.1. Lagrangian density | 319 | 🔗 link | 🗖 nosplit | ↑ parent "Lagrangian (field theory)"
      - 11.7.3.2. Generalized coordinate | 89 | 🔗 link | 🗖 nosplit | ↑ parent "Lagrangian"
    - 11.7.4. Noether's theorem | 247, 259, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Lagrangian mechanics"
      - 11.7.4.1. Time invariance implies energy conservation | 12 | 🔗 link | 🗖 nosplit | ↑ parent "Noether's theorem"
    - 11.7.5. Spontaneous symmetry breaking | 🔗 link | 🗖 nosplit | ↑ parent "Lagrangian mechanics"
    - 11.7.6. Hamiltonian mechanics | 82, 268, 4 | 🔗 link | 🗖 nosplit | ↑ parent "Lagrangian mechanics"
    - 11.7.7. Equivalence between Lagrangian and Hamiltonian formalisms | 4, 27, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Lagrangian mechanics"
      - 11.7.7.1. Legendre transformation | 23 | 🔗 link | 🗖 nosplit | ↑ parent "Equivalence between Lagrangian and Hamiltonian formalisms"
- 12. Computational physics | 111, 306, 8 | 🔗 link | 🗖 nosplit | ↑ parent "Physics"
  - 12.1. Computational chemistry | 0, 195, 7 | 🔗 link | 🗖 nosplit | ↑ parent "Computational physics"
    - 12.1.1. Quantum chemistry | 135, 157, 4 | 🔗 link | 🗖 nosplit | ↑ parent "Computational chemistry"
      - 12.1.1.1. Relativistic quantum chemistry | 14 | 🔗 link | 🗖 nosplit | ↑ parent "Quantum chemistry"
      - 12.1.1.2. Quantum chemistry software | 0, 8, 2 | 🔗 link | 🗖 nosplit | ↑ parent "Quantum chemistry"
        
        12.1.1.2.1. PySCF | 4 | 🔗 link | 🗖 nosplit | ↑ parent "Quantum chemistry software"
        
        12.1.1.2.2. Psi4 | 4 | 🔗 link | 🗖 nosplit | ↑ parent "Quantum chemistry software"
    - 12.1.2. Quantum computing computational chemistry algorithms | 0, 38, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Computational chemistry"
      - 12.1.2.1. IBM 2017 beryllium hydride ground state calculation on a quantum computer | 38 | 🔗 link | 🗖 nosplit | ↑ parent "Quantum computing computational chemistry algorithms"
- 13. Physics conference | 0, 243, 5 | 🔗 link | 🗖 nosplit | ↑ parent "Physics"
  - 13.1. Solvay Conference (1911) | 0, 0, 2 | 🔗 link | 🗖 nosplit | ↑ parent "Physics conference"
    - 13.1.1. First Solvay Conference (1911) | 🔗 link | 🗖 nosplit | ↑ parent "Solvay Conference"
    - 13.1.2. Fifth Solvay Conference (1927) | 🔗 link | 🗖 nosplit | ↑ parent "Solvay Conference"
  - 13.2. Shelter Island Conference (1947) | 156, 243, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Physics conference"
    - 13.2.1. Pocono conference (1948) | 87 | 🔗 link | 🗖 nosplit | ↑ parent "Shelter Island Conference"
- 14. Physicist | 17, 3k, 54 | 🔗 link | 🗖 nosplit | ↑ parent "Physics"
  - 14.1. Albert Einstein | 🔗 link | 🗖 nosplit | ↑ parent "Physicist"
  - 14.2. Barton Zwiebach | 19 | 🔗 link | 🗖 nosplit | ↑ parent "Physicist"
  - 14.3. Carl David Anderson | 🔗 link | 🗖 nosplit | ↑ parent "Physicist"
  - 14.4. David Tong | 65 | 🔗 link | 🗖 nosplit | ↑ parent "Physicist"
  - 14.5. Enrico Fermi (1901-1954) | 37 | 🔗 link | 🗖 nosplit | ↑ parent "Physicist"
  - 14.6. Ettore Majorana | 23, 23, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Physicist"
    - 14.6.1. Majorana fermion | 🔗 link | 🗖 nosplit | ↑ parent "Ettore Majorana"
  - 14.7. Freeman Dyson (1923-2020, God) | 88, 137, 2 | 🔗 link | 🗖 nosplit | ↑ parent "Physicist"
    - 14.7.1. Work by Freeman Dyson | 6 | 🔗 link | 🗖 nosplit | ↑ parent "Freeman Dyson"
    - 14.7.2. Freeman Dyson Web of Stories interview (1998) | 43 | 🔗 link | 🗖 nosplit | ↑ parent "Freeman Dyson"
  - 14.8. Galileo Galilei | 🔗 link | 🗖 nosplit | ↑ parent "Physicist"
  - 14.9. Isidor Isaac Rabi | 63 | 🔗 link | 🗖 nosplit | ↑ parent "Physicist"
  - 14.10. Jakob Schwichtenberg | 50, 99, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Physicist"
    - 14.10.1. Physics Travel Guide | 49 | 🔗 link | 🗖 nosplit | ↑ parent "Jakob Schwichtenberg"
  - 14.11. John Archibald Wheeler | 43 | 🔗 link | 🗖 nosplit | ↑ parent "Physicist"
  - 14.12. John Bardeen | 🔗 link | 🗖 nosplit | ↑ parent "Physicist"
  - 14.13. John von Neumann | 53 | 🔗 link | 🗖 nosplit | ↑ parent "Physicist"
  - 14.14. Julian Schwinger | 🔗 link | 🗖 nosplit | ↑ parent "Physicist"
  - 14.15. Karl Guthe Jansky | 🔗 link | 🗖 nosplit | ↑ parent "Physicist"
  - 14.16. Leonard Susskind | 22, 28, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Physicist"
    - 14.16.1. Lectures by Leonard Susskind | 6 | 🔗 link | 🗖 nosplit | ↑ parent "Leonard Susskind"
  - 14.17. Hans Bethe | 126 | 🔗 link | 🗖 nosplit | ↑ parent "Physicist"
  - 14.18. Hermann Weyl (1885-1955) | 🔗 link | 🗖 nosplit | ↑ parent "Physicist"
  - 14.19. Marie Curie | 🔗 link | 🗖 nosplit | ↑ parent "Physicist"
  - 14.20. Michio Kaku | 30 | 🔗 link | 🗖 nosplit | ↑ parent "Physicist"
  - 14.21. Murray Gell-Mann | 140 | 🔗 link | 🗖 nosplit | ↑ parent "Physicist"
  - 14.22. Niels Bohr (1885-1962) | 🔗 link | 🗖 nosplit | ↑ parent "Physicist"
  - 14.23. Richard Feynman | 600, 1k, 11 | 🔗 link | 🗖 nosplit | ↑ parent "Physicist"
    - 14.23.1. Arline Greenbaum | 132 | 🔗 link | 🗖 nosplit | ↑ parent "Richard Feynman"
    - 14.23.2. Richars Feynman's firs seminar in 1941 | 24 | 🔗 link | 🗖 nosplit | ↑ parent "Richard Feynman"
    - 14.23.3. Works by Richard Feynman | 6, 22, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Richard Feynman"
      - 14.23.3.1. Space-Time Approach to Quantum Electrodynamic by Richard Feynman (1949) | 16 | 🔗 link | 🗖 nosplit | ↑ parent "Works by Richard Feynman"
    - 14.23.4. Works about Richard Feynman | 0, 447, 6 | 🔗 link | 🗖 nosplit | ↑ parent "Richard Feynman"
  - 14.24. Pascual Jordan | 18 | 🔗 link | 🗖 nosplit | ↑ parent "Physicist"
  - 14.25. Paul Dirac | 477 | 🔗 link | 🗖 nosplit | ↑ parent "Physicist"
  - 14.26. Pieter Zeeman | 🔗 link | 🗖 nosplit | ↑ parent "Physicist"
  - 14.27. Polykarp Kusch | 🔗 link | 🗖 nosplit | ↑ parent "Physicist"
  - 14.28. Sean M. Carroll | 62, 99, 2 | 🔗 link | 🗖 nosplit | ↑ parent "Physicist"
    - 14.28.1. The Purpose of Harvard is Not to Educate People by Sean Carroll (2008) | 33 | 🔗 link | 🗖 nosplit | ↑ parent "Sean M. Carroll"
    - 14.28.2. How To Get Tenure at a Major Research University by Sean Carroll (2011) | 4 | 🔗 link | 🗖 nosplit | ↑ parent "Sean M. Carroll"
  - 14.29. Stephen Hawking | 125 | 🔗 link | 🗖 nosplit | ↑ parent "Physicist"
  - 14.30. Tobias J. Osborne | 33 | 🔗 link | 🗖 nosplit | ↑ parent "Physicist"
  - 14.31. Victor Francis Hess | 🔗 link | 🗖 nosplit | ↑ parent "Physicist"
  - 14.32. Walter Houser Brattain | 🔗 link | 🗖 nosplit | ↑ parent "Physicist"
  - 14.33. Werner Heisenberg | 🔗 link | 🗖 nosplit | ↑ parent "Physicist"
  - 14.34. William Shockley | 🔗 link | 🗖 nosplit | ↑ parent "Physicist"
  - 14.35. Willis Lamb | 🔗 link | 🗖 nosplit | ↑ parent "Physicist"
  - 14.36. Wolfgang Pauli | 27 | 🔗 link | 🗖 nosplit | ↑ parent "Physicist"
- 15. Philosophy of Science | 0, 865, 7 | 🔗 link | 🗖 nosplit | ↑ parent "Physics"
  - 15.1. Never trust an experiment that is not supported by a good theory | 136 | 🔗 link | 🗖 nosplit | ↑ parent "Philosophy of Science"
  - 15.2. Physics and the illusion of life | 245, 717, 3 | 🔗 link | 🗖 nosplit | ↑ parent "Philosophy of Science"
  - 15.3. Reductionism | 0, 12, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Philosophy of Science"
    - 15.3.1. Emergence | 12 | 🔗 link | 🗖 nosplit | ↑ parent "Reductionism"
- 16. Unsolved physics problem | 111 | 🔗 link | 🗖 nosplit | ↑ parent "Physics"
- 17. Physics bibliography | 0, 334, 11 | 🔗 link | 🗖 nosplit | ↑ parent "Physics"
  - 17.1. Theoretical Physics Reference by Ondrej Certík (certik/theoretical-physics) | 69 | 🔗 link | 🗖 nosplit | ↑ parent "Physics bibliography"
  - 17.2. Physics YouTube channel | 9, 265, 9 | 🔗 link | 🗖 nosplit | ↑ parent "Physics bibliography"
    - 17.2.1. Looking Glass Universe | 60 | 🔗 link | 🗖 nosplit | ↑ parent "Physics YouTube channel"
    - 17.2.2. Faculty of Khan | 10 | 🔗 link | 🗖 nosplit | ↑ parent "Physics YouTube channel"
    - 17.2.3. minutephysics | 4 | 🔗 link | 🗖 nosplit | ↑ parent "Physics YouTube channel"
    - 17.2.4. Physics Explained | 23 | 🔗 link | 🗖 nosplit | ↑ parent "Physics YouTube channel"
    - 17.2.5. ScienceClic | 21 | 🔗 link | 🗖 nosplit | ↑ parent "Physics YouTube channel"
    - 17.2.6. Steve Mould | 4 | 🔗 link | 🗖 nosplit | ↑ parent "Physics YouTube channel"
    - 17.2.7. The Science Asylum | 4, 37, 1 | 🔗 link | 🗖 nosplit | ↑ parent "Physics YouTube channel"
      - 17.2.7.1. Nick Lucid | 33 | 🔗 link | 🗖 nosplit | ↑ parent "The Science Asylum"
    - 17.2.8. Veritasium | 97 | 🔗 link | 🗖 nosplit | ↑ parent "Physics YouTube channel"

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Deep tech | 452
Don't be a pussy | 2k, 2k, 2
Existence and uniqueness of solutions of partial differential equations | 111
Formalization of Mathematics | 457, 866, 25
Having more than one natural language is bad for the world | 1k
High flying bird vs gophers | 625
Important partial differential equation | 43, 793, 24
Minimal working example | 64
Murray Gell-Mann | 140
Open boundary condition | 115
Physics | 276, 39k, 680
Physics Travel Guide | 49
Ron Maimon | 1k
Rooting for sport teams | 458
Single particle double slit experiment | 347
The beauty of mathematics | 259, 552, 4
The most important projects done by Ciro Santilli | 157, 4k, 4
Theory of everything | 140, 204, 3
Videos of all key physics experiments | 489