Question

An underwater somar source operating at a frequency of 60 khz directs its beam towards the surface the surface .if the velocity of sound in air is 330m/s,the wavelength and frequency of waves in air are

Answer 1

Frequency of waves remains same, i.e. 60 Hz                    and wavelength 

λ=v/n=330/60×10^3

= 5.5 mm.