An observer S sees light emitted from a source to his right, while a spacecraft
ID: 1777020 • Letter: A
Question
An observer S sees light emitted from a source to his right, while a spacecraft carrying observer
S' approaches observer S from the left at a speed of 0.5c. Which of the following statements is
true?
i) according to observer S, the light approaches observer S' at 1.5c
ii) according to observer S', the light approaches observer S' at 1.5c
iii) according to observer S, the light approaches observer S' at c
iv) according to observer S', the light approaches observer S' at c
A. i and iv
B. i and ii
C. iii and iv
D. only iv
E. only iii
Explanation / Answer
Option C is the correct answer. According to the postulate of special theory of relativity the speed of light is same in all inertial frame of referrence. So the speed of light is c in both the frames.