Question

Spaceships A and B are traveling directly toward each other at a speed 0.5c relative to the Earth, and each has a headlight aimed toward the other ship.


What value do technicians on ship B get by measuring the speed of the light emitted by ship A's headlight?


Answer choices


1).75c


2)1.0c


3)1.5c


4) .5c

Answer 1

The answer is 2) 1.0c. Light will always propagate through a vacuum at the speed of light “c”; even when moving at a significant fraction of the speed of light, observers will still measure this as the speed of light and the difference is resultant of time dilation.