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Wavelength of ultrasonic waves in air is...

Wavelength of ultrasonic waves in air is of the order of :

A

`10^(2)` m

B

`10^(1)` m

C

`10^(-2)`

D

`10^(0)`m

Text Solution

Verified by Experts

The correct Answer is:
D
In case of ultrasonics, frequency `n gt 20,000` Hz
`therefore lambda = v/m lt 330/(20,000) = 10^(-2) m`
However, for infrasonics, frequency `n lt 20 Hz`
`therefore lambda = v/n gt 330/20 = 15 m`
`=10^(1) m`
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