Because of the Doppler effect,a light- or sound-emitting object moving toward you has a ________ compared to a stationary object.
A)higher amplitude
B)lower frequency
C)lower amplitude
D)higher frequency

Question

Quizplus · Accepted Answer

The Doppler effect causes the wavelengths of sound or light waves from a moving object to become compressed as the object moves toward the observer, resulting in a higher frequency (and thus a higher pitch for sound waves or a bluer hue for light waves). Conversely, if the object is moving away from the observer, the wavelengths become stretched out, resulting in a lower frequency (and a lower pitch for sound waves or a redder hue for light waves). Therefore, a light- or sound-emitting object moving toward you has a higher frequency compared to a stationary object.

Because of the Doppler Effect,a Light- or Sound-Emitting Object Moving