A vibrating guitar string emits a tone simultaneously with one from a 495-Hz tuning fork.If a beat frequency of 5.00 Hz results,what is the frequency of vibration of the string?
A)2 480 Hz
B)500 Hz
C)490 Hz
D)250 Hz
E)Either choice b or c is valid.

Question

Quizplus · Accepted Answer

The beat frequency is the absolute difference between the frequencies of the two sources. Given a beat frequency of 5 Hz and a tuning fork frequency of 495 Hz, the string's frequency could be either 495 + 5 = 500 Hz or 495 - 5 = 490 Hz. Therefore, both choices B and C are valid.

A Vibrating Guitar String Emits a Tone Simultaneously with One