Thu 29 Jul, 2021 06:37 am - Imagine that you are standing still next to a railroad track and a train is passing you at 60 mph. The boxcars are 1 mile long so that there is 1 minute between the arrival of each boxcar. You now... (view)
Tue 27 Jul, 2021 08:15 am - There is no mistake as far as I can tell. The situation is exactly reversed so I don't see how there can be a mistake.
Flashlight straight up:
Sally sees light going straight up.
John... (view)
Tue 27 Jul, 2021 05:14 am - "What you are doing is confusing the to reference frames. For each calculation you need to be clear about whose reference frame you are measuring in. Once you jump from one frame to the other,... (view)
Thu 22 Jul, 2021 11:30 pm - The function is
T1 = T0 √(1 - v^2/c^2)
That equation is derived in the textbooks by Sally in a moving spaceship having a flashlight pointed straight up. Why are we required to use only... (view)
Fri 7 May, 2021 08:14 pm - Here are 2 ships passing each other...
Ship1 with Joe, Sally, and Fred is viewed as being at rest.
[code]
Joe----------Sally----------Fred
<-----... (view)
Mon 12 Apr, 2021 11:10 am - The 2 events are L1 flashing in one frame, L1 flashing in the other frame. If the 2 events are simultaneous then the light from L2 is both traveling through space and not traveling through space... (view)
Mon 12 Apr, 2021 09:24 am - For one frame L1 flashes and L2 hasn't yet flashed.
For the other frame L1 flashes L2 has already flashed.
The only way that these events could not be simultaneous is if L1 flashing is not... (view)
Mon 12 Apr, 2021 05:41 am - Thanks for the post of irrelevant information.
So to summarize...
At the moment that L1 flashes...
One observer says the light from L2 has been emitted.
The other observer says the light... (view)
Mon 12 Apr, 2021 12:23 am - If the light from L2 has been both emitted and not emitted at the moment that L1 flashes depending on the frame of reference how is it not the case that the light from L2 is simultaneously both... (view)
