Timeline for Why do gamma ray and x-ray photons which have significantly higher energy travel at the same speed as photons of visible light? [duplicate]
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| Jan 28, 2021 at 15:47 | history | duplicates list edited | John Rennie | duplicates list edited from Why does speed of light have to be constant? to Is the speed of light in vacuum always the same value?, Why does speed of light have to be constant? | |
| Jan 28, 2021 at 15:46 | history | closed | John Rennie visible-light Users with the visible-light badge or a synonym can single-handedly close visible-light questions as duplicates and reopen them as needed. | Duplicate of Why does speed of light have to be constant? | |
| Jan 28, 2021 at 15:43 | comment | added | Gert | In vacuum the speed of EMW is invariant to energy, frequency and wavelength and is ALWAYS equal to $c$. | |
| Jan 28, 2021 at 15:32 | comment | added | Jon Custer | Because that is how electromagnetic waves work as opposed to particles with mass? | |
| Jan 28, 2021 at 15:25 | history | asked | schizoid_man | CC BY-SA 4.0 |