Timeline for What is the velocity of a photon with respect to another one?
Current License: CC BY-SA 4.0
4 events
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| Jul 13, 2021 at 19:35 | history | edited | Andrew Yuan | CC BY-SA 4.0 |
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| Jul 13, 2021 at 19:34 | comment | added | Nuclear Hoagie | You're correct that we can't really define relative speed for photons since there's no reference frame in which a photon is at rest. That said, an external observer not moving at $c$ will observe two photons going in opposite directions increasing in distance at the rate of $2c$, despite the fact that no object can ever move faster than $c$. | |
| Jul 13, 2021 at 19:34 | comment | added | KP99 | Nope. Massless particles will travel at c locally wrt any observer | |
| Jul 13, 2021 at 19:25 | history | answered | Andrew Yuan | CC BY-SA 4.0 |