3 ms·

I'm not sure how this works out in media which slow down light https://en.wikipedia.org/wiki/Cherenkov_radiation https://en.wikipedia.org/wiki/Cherenkov_radiat

I'm not sure how this works out in media which slow down light https://en.wikipedia.org/wiki/Cherenkov_radiation https://en.wikipedia.org/wiki/Cherenkov_radiation There, e.g. gravitational waves will be at c (in a vacuum), but wouldn't photons experience time there? Edit: I suppose the photons are still actually moving at c

djmips 4y ago
I had thought because light was absorbed and re-emitted but that and scattering ideas are incorrect. See this video for an explanation of why light travels slower through a medium with an index of refraction greater than one. https://youtu.be/CUjt36SD3h8 https://youtu.be/CUjt36SD3h8