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Two waves of wavelength 99cm and 100cm b...

Two waves of wavelength `99cm` and `100cm` both travelling with the velocity of `396ms^(-1)` are made to interfere. Calculate the number of beats produced `b` then per sec.

Text Solution

Verified by Experts

`V=lambdaf`
`f=(v)/(lambda)`
`f_(1)=(v)/(lambda_(1))=(396)/(0.99)=400Hz`.
`f_(2)=(v)/(lambda_(2))=(396)/(1)=396Hz`.
`n=f_(2)-f_(1)=400-396=4` beats per second .
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