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Two adjacent piano keys are struck simul...

Two adjacent piano keys are struck simultaneously. The notes emitted by them have frequencies `n_(1) and n_(2)` . The number of beats heard per second is

A

`(1)/(2) (n_(1)-n_(2))`

B

`(1)/(2) (n_(1)+n_(2))`

C

`n_(1) ~ n_(2)`

D

`2 (n_(1)-n_(2))`

Text Solution

Verified by Experts

The correct Answer is:
C
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