Theory that describes electrons and photons really well, and as Feynman puts it "accounts very precisely for all physical phenomena we have ever observed, except for gravity and nuclear physics" ("including the laughter of the crowd" ;-)).
While Ciro acknowledges that QED is intrinsically challenging due to the wide range or requirements (quantum mechanics, special relativity and electromagnetism), Ciro feels that there is a glaring gap in this moneyless market for a learning material that follows the Middle Way between:
Richard Feynman Quantum Electrodynamics Lecture at University of Auckland (1979) is one of the best attempts so far, but it falls a bit too close to the superficial side of things, if only Feynman hadn't assumed that the audience doesn't know any mathematics...
The funny thing is that when Ciro's mother retired, learning it (or as she put it: "how photons and electrons interact") was also one of her retirement plans. She is a pharmacist by training, and doesn't know much mathematics, and her English was somewhat limited. Oh, she also wanted to learn how photosynthesis works (possibly not fully understood by science as that time, 2020). Ambitious old lady!!!
Experiments: quantum electrodynamics experiments.
Before QED, the most advanced theory was that of the Dirac equation, which was already relativistic but TODO what was missing there exactly?
As summarized at: https://youtube.com/watch?v=_AZdvtf6hPU?t=305:
- classical mechanics describes large and slow objects
- special relativity describes large and fast objects
- classical quantum mechanics describes small and slow objects
- QED describes objects that are both small and fast
That video also mentions the interesting idea that:
QED is the first quantum field theory fully developed. That framework was later extended to also include the weak interaction and strong interaction. As a result, it is perhaps easier to just Google for "Quantum Field Theory" if you want to learn QED, since QFT is more general and has more resources available generally.
- Table of contents | 653, 18, 2k
- 1. Quantum electrodynamics experiments | 42, 4, 245
- 3. Quantum electrodynamics Lagrangian | 37, 1, 117
- 6. Feynman diagram | 120, 2, 125
- 7. Cavity quantum electrodynamics | 0, 1, 0
- 8. Quantum electrodynamics bibliography | 0, 2, 934
- Andrew Dotson YouTube channel
- Color confinement
- Dietterich Labs
- Dirac equation
- Don't be a pussy
- Feynman diagram
- Hyperfine structure
- Lamb shift
- Maxwell's equations
- Millennium Prize Problems
- Particle physics
- Quantum chemistry
- Quantum field theory
- Quantum mechanics
- Relativistic quantum mechanics
- Richard Feynman
- Richard Feynman Quantum Electrodynamics Lecture at University of Auckland (1979)
- Spectral lines of atoms and molecules