Three observers A, R and C measure the speed of light coming from a source to be v a , v B and v C . 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.

Question

Philoid · Accepted 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.

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.

Three observers A, R and C measure the speed of light coming from a source to be v_a, v_B and v_C. 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.