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The wavelength of two sound waves are 49...

The wavelength of two sound waves are `49 cm` and `50 cm` , respectively . If the room temprature is `30^(@) C` , then the number of beats producted by them is approximatelt
(velocity of sound in air at `30 ^(@) C = 332 m//s`)

A

`6`

B

`10`

C

`13`

D

`18`

Text Solution

Verified by Experts

The correct Answer is:
C
`f_(b) = f_(1) - f_(2) = (nu)/(lambda _(1)) - (nu)/(lambda_(2))`
= `(332)/(0.49) - (332)/(0.5) ~~13 H_(Z)`
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