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Beats are produced by two waves given by...

Beats are produced by two waves given by `y_1 = a sin2000 pit` and `y_2 =asin2008 pit`. The number of beats heard per second is

A

zero

B

one

C

four

D

eight

Text Solution

Verified by Experts

The correct Answer is:
C
Number of beats per second `=n_1-n_2`
`omega_1=2000pi=2pin_1impliesn_1=1000`
and `omega_2=2008pi=2pin_2impliesn_2=1004`
Number of heats heard per sec`=1004-1000=4`
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