#### Prosoothus

**Registered Senior Member**

I've been at sciforums for over a year debating relativity, and yet it still confuses me. I have conjured up a thought experiment, and would appreciate any feedback regarding the results of the experiment according to SR. Maybe this will help me understand relativity a little better.

Here's the thought experiment (see attachment):

There are two atomic clocks: clock A and B. Both of them are off, and their times are set to 0, at location s0. The two clocks begin accelerating. They both reach a speed of .90c before they reach point s1. As a result, when they reach s1 they are both travelling at a speed of .90c and ARE NOT accelerating. When they reach point s1, the beam of laser 1 hits both of the clocks. The clocks detect the signal using photocells. As soon as the two clocks detect the laser beam, they switch on and start to tick. They both continue to travel at .90c, and continue to tick, until they reach lasers 2a and 2b. When the clocks detect the laser beams from lasers 2a and 2b, they switch off (they record the time and stop ticking). Finally, the clocks are brought together so that an observer can see their recorded time. What time will the observer see on each clock?

Note:The clocks are only ticking when they are travelling at a constant velocity (not accelerating). Also, there are no gravitational fields in the area that can influence the clocks.

Edit: I changed the distance measurements in the illustration to make calculations easier. Attachment is in next post.

Tom

Here's the thought experiment (see attachment):

There are two atomic clocks: clock A and B. Both of them are off, and their times are set to 0, at location s0. The two clocks begin accelerating. They both reach a speed of .90c before they reach point s1. As a result, when they reach s1 they are both travelling at a speed of .90c and ARE NOT accelerating. When they reach point s1, the beam of laser 1 hits both of the clocks. The clocks detect the signal using photocells. As soon as the two clocks detect the laser beam, they switch on and start to tick. They both continue to travel at .90c, and continue to tick, until they reach lasers 2a and 2b. When the clocks detect the laser beams from lasers 2a and 2b, they switch off (they record the time and stop ticking). Finally, the clocks are brought together so that an observer can see their recorded time. What time will the observer see on each clock?

Note:The clocks are only ticking when they are travelling at a constant velocity (not accelerating). Also, there are no gravitational fields in the area that can influence the clocks.

Edit: I changed the distance measurements in the illustration to make calculations easier. Attachment is in next post.

Tom

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