While Emitting Light of Proper Frequency F₀, a Source Moves

question 47

Multiple Choice

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