Q. 5

Three observers A, R and C measure the speed of light coming from a source to be va, vB and vC. The observer A moves towards the source and C moves away from the source at the same speed. The observer B stays stationary. The surrounding space is vacuum everywhere.
A. vA > vB > vC

B. vA < vB < vC

C. vA = vB = vC


Answer :

The speed of light never changes in a medium and is a universal constant. Hence, option (C) is correct.

By rearranging, we come to option(D). Hence, it is also correct.

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