A beam of light is moving in the same direction as an object is traveling. If the object is moving at speed 0.70 c, how fast is the light moving as it passes the object?
A)c
B)1.35 c
C)1.40 c
D)0.3 c
E)1.70 c

Question

Quizplus · Accepted Answer

The speed of light in a vacuum is always c (approximately 299,792,458 meters per second) regardless of the observer's motion, according to the principle of the constancy of the speed of light in Einstein's theory of relativity.

A Beam of Light Is Moving in the Same Direction