A bat emits ultrasonic sound a frequency 1000kHz in air. If the sound meets a water surface, what is the wavelength of (a) the reflected sound, (b) the transmitted sound ? Speed of sound in air is `340ms^(-1)` and in water `1486ms^(-1)`

Explanation

Here `V = 1000 KHz = 10^(5) Hz, V_(a)= 340 m//s,V_(W) = 1486m//s^(-1)`
Wavelength of reflected sound,` lambda _(a) = ( V^(a))/(V)`
`= (340)/( 10^(6))= 3.4 xx 10^(-4) m `
Wavelenth of transmitted sound ,
`lambda_(w) =(V_(w))/(V) = (1486)/(10^(6)) =1.486 xx 10^(-3)`