A bat flies perpendicularly towards a wall with a speed of 6 m/s, emitting sound of frequency 450 kHz. What is the frequency of the wave reflected from the wall that it will hear? Given `c=340(m)/(s)`?

Explanation

Here, the bat is the observer and the image is the source
`n'=(c-v_0)/(c-v_S)xxn`
`=[(340-(-6))/(340-6)]450=466kHz`