A bat emits ultrasonic sound of frequency 100 kHz in air. If this sound meets a water surface, the wavelengths of the reflected and transmitted sound are (Speed of sound in air = 340 m `s^(-1)` and in water = 1500 m `s^(-1)` )

Options

A. `3.4xx10^(-3)m`
B. `1.49xx10^(-2)m`
C. `3.4xx10^(-2)m`
D. `1.49xx10^(-3)m`

Answer

C

Explanation

Here, `upsilon=100 kHz=10^(5)Hz,v_(a)=340ms^(-1),v_(w)=1486ms^(-1)`
Wavelength of transmitted sound,
`lambda_(w)=(v_(w))/(upsilon)=(1486)/(10^(5))=1486xx10^(-5)m=1.49xx10^(-2)m`