This only makes sense if the photon exists, there is no classical analogue, because the energy of classical waves depends only on their amplitude, not frequency.
Experiments that suggest this:
- Planck's law | 104, 362, 3
- Black-body radiation experiment | 33, 395, 4
- Quantum mechanics experiments | 34, 1k, 14
- Quantum mechanics | 170, 11k, 165
- Particle physics | 140, 19k, 291
- Physics | 276, 25k, 429
- Natural science | 0, 30k, 686
- Science | 0, 36k, 821
- Ciro Santilli's Homepage | 238, 147k, 2k
- Compton scattering | 116
- Photoelectric effect | 56
- Planck constant | 98, 182, 1
- Spontaneous parametric down-conversion | 378