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The phase difference between two points ...

The phase difference between two points separated by 0.8 m in a wave of frequency 120 Hz is `0.5pi`. The velocity of wave will be

A

720 m/s

B

384 m/s

C

256 m/s

D

144 m/s

Text Solution

Verified by Experts

The correct Answer is:
B
Phase difference `phi=(2pi)/(lambda)xxDeltax`
`implies" "0.5pi=(2pi)/(lambda)xx0.8`
or `" "lambda=(2pixx0.8)/(0.5pi)=3.2" m"`
`:." "v=nlambda=120xx3.2`
`=384" m"//"s"`
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