The Doppler effect is useful in measuring the ____.
A) distance to an object
B) chemical composition of an object
C) temperature of an object
D) motion of an object across the line of sight of an observer
E) motion of an object toward or away from the observer

Question

Quizplus · Accepted Answer

The Doppler effect measures changes in frequency or wavelength of waves from an object moving toward or away from the observer, indicating its radial motion.

The Doppler Effect Is Useful in Measuring the ____