A source of waves and an observer are both initially stationary. The observer will detect a steadily increasing frequency if which of the following occurs?
A. He accelerates toward the source.
B.
He moves toward the source at a constant speed.
c. The source accelerates away from him.
D.
The source moves away from him at a constant speed.



Answer :

Final answer:

The Doppler effect causes an increase in frequency when an observer moves toward a wave source.


Explanation:

If the observer moves toward the source at a constant speed, the observer will detect a steadily increasing frequency of the waves. This phenomenon is known as the Doppler effect, where motion relative to the source impacts the observed frequency: motion toward the source increases frequency, while motion away from the source decreases frequency.


Learn more about Doppler effect here:

https://brainly.com/question/44077279