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Triangle of lights paradox

 
 
Reply Fri 18 Dec, 2020 03:20 pm
There are 3 lights in the form of a triangle. A, B, and C are lights and are stationary with respect to each other. S1, S2, S3 are spaceships.
Code:
B

S1 S2

A S3 C

The ships are moving clockwise. S1 is moving from A towards B. S2 is moving from B towards C. S3 is moving from C towards A. A, B, and C flash simultaneously in their frame of reference. So in the frame of reference of S3, A flashes first followed by C flashing. In the frame of reference of S2, C flashes first followed by B flashing. In the frame of reference of S1, B flashes first followed by A flashing. So the sequence of flashing is A, C, B, A. But wait! A flashed first. How can it flash last? How can A flash both first and last?
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Type: Discussion • Score: 0 • Views: 160 • Replies: 1
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maxdancona
 
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Reply Fri 18 Dec, 2020 06:12 pm
S3 is moving
Towards A
Tangential to B
Away from C

S1 is moving
Towards B
Tangential to C
Away from A

S2 is moving
Towards C
Tangential to A
Away from B

This seems pretty straightforward to me. There is no paradox here.

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