question_answer

Three observers A, B, C measure the speed of light coming from a source to be\[{{v}_{A}},{{v}_{B}}\]and\[{{v}_{C}}\]. The observer A moves away from the source at the same speed. The observer B stays stationary. The surrounding space is vacuum everywhere. Then:

A)  \[{{v}_{A}}>{{v}_{B}}>{{v}_{C}}\]            

B)         \[{{v}_{A}}<{{v}_{B}}<{{v}_{C}}\]            

C)         \[{{v}_{A}}={{v}_{B}}={{v}_{C}}\]            

D)         \[{{v}_{A}}={{v}_{B}}>{{v}_{C}}\]

E)  \[{{v}_{B}}={{v}_{C}}>{{v}_{A}}\]