Timeline for Is the one-way speed of light in vacuum different depending on direction?
Current License: CC BY-SA 4.0
11 events
| when toggle format | what | by | license | comment | |
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| Mar 7, 2021 at 3:48 | comment | added | g s | If we use a relativistic velocity for V, we have to add it relativisticly as $V+V = 2V / (1+ V^2/c^2)$. Importing the mathematical conclusions of relativity into our mathless argument for why we can trust the mathematical conclusions of relativity is probably a bad idea, since if we're going to do that anyway we could just skip right to the end and say $c+V = (c+V)/(1+V/c) = c(c+V)/(c+V)=c$, the speed of light is invariant with velocity, job done, nothing to see here. | |
| Mar 6, 2021 at 19:35 | comment | added | Quantumplate | So I think I agree with the "fixed velocity K" outcome (altho still some clarifications about how we got there). The observation that its meaningless applies to people in the frame trying to calculate things. For me, I am a programmer and wish to understand the rules so I can reproduce them (in code), so this has some meaning for me. | |
| Mar 6, 2021 at 19:29 | comment | added | Quantumplate | If we take V as .9c, then add V to everything, this will give .9c for A, 1.8c for B and 0 for C. Is this A's perspective of frame C (as the 1.8c makes sense in that regard, but doesn't if it's C's perspective)? | |
| Mar 5, 2021 at 6:26 | comment | added | Quantumplate | When you add V to everything, if there is a (vertical) light clock in frame C are you adding V to the photons in the clock so that they stay vertically aligned with the clock? If so is there a reason you add V to some light (that in the frame) but not other light (that outside it)? If not, won't the photons continue left and leave the clock? | |
| Mar 5, 2021 at 5:02 | history | edited | g s | CC BY-SA 4.0 |
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| Mar 5, 2021 at 5:01 | comment | added | g s | I added a short addendum further explaining the reason why the answer to the meaningful question (the variable velocity difference case) is "no". | |
| Mar 5, 2021 at 4:21 | comment | added | g s | Yes, when I added and subtracted velocities, I was changing the velocities of A, B, and C, not the velocity of the light. | |
| Mar 5, 2021 at 2:36 | comment | added | Quantumplate | Can I confirm that you are adding V to everything, except the speed of light for L & R? This is because "the speed of light is the same in all reference frames"? e.g. all frames will measure it as c anyway? | |
| Mar 4, 2021 at 22:33 | comment | added | g s | Re: fixed velocity difference case: velocity is not speed. It has direction, so the velocity of light from L is K+c and the velocity of light from R is K-c. The speed is the absolute value. | |
| Mar 4, 2021 at 9:51 | history | edited | g s | CC BY-SA 4.0 |
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| Mar 4, 2021 at 9:29 | history | answered | g s | CC BY-SA 4.0 |