An observer on Earth sees Planet X to be stationary and also sees a rocket traveling...
An observer on Earth sees Planet X to be stationary and also sees a rocket traveling toward Planet X at 0.5c. The rocket emits a pulse of light that travels outward in all directions. According to an observer on Planet X, how fast is the light pulse traveling toward them? a) 2c/3 b) c/2 c) 2c/3 d) 5c/6 e) c
Homework Answers
The whole idea behind the theory of relativity is that the speed of light is a universal constant irrespective of the reference frame. So, the speed of the light pulse will always be c. The only change would be its wavelength.
So, the correct answer is e) c.
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