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in Physics by (78.5k points)

While emitting light of proper frequency f0, a source moves to the right with speed c/4 relative to reference frame S. A detector, to the left of the source, measures the frequency to be f, which is greater than f0. This means:

A. the detector is moving to the right with a speed that is greater than c/4 relative to S 

B. the detector is moving to the right with a speed that is less than c/4 relative to S 

C. the detector is moving to the left with a speed that is greater than c/4 relative to S 

D. the detector is moving to the left with a speed that is less than c/4 relative to S 

E. the detector is not moving

1 Answer

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Best answer

A. the detector is moving to the right with a speed that is greater than c/4 relative to S

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