According to special relativity, what is the speed of light measured in a spaceship traveling at 0.40 c?
A) 0.60 c
B) 1.4 c
C) 0.86 c
D) 1.0 c
E) None of these choices are correct.

Question

Quizplus · Accepted Answer

According to special relativity, the speed of light is always measured as c, regardless of the motion of the observer. Therefore, the speed of light measured in a spaceship traveling at 0.40 c is still c.

According to Special Relativity, What Is the Speed of Light