Eli5 how does a photon not experience time when zooming toward point b? Wouldn’t other photons from point b passing it appear as time happening very quickly?

Question

Eli5 how does a photon not experience time when zooming toward point b? Wouldn’t other photons from point b passing it appear as time happening very quickly?

In: 425

Answer 1

Photons don’t “experience” anything. Obviously, from a philosophical standpoint, they aren’t people and don’t have experiences. But a rock experiences time, in the sense that it experiences erosion, and maybe its atoms undergo radioactive decay and stuff. A photon doesn’t do any of that. It just has its wavelength and its direction of travel and its angular momentum, and that’s all. There’s nothing “inside” a photon that can change. If a photon hits another particle and has its direction or angular momentum changed, then… well, the question of “is it still the same photon or a new photon?” is another one of those philosophical questions.