00:01
In this problem, we have been given that there is a source and this source is stationary and it is emitting sound waves and we are required to determine what will happen to the frequency of the emitted wave as we move away from the source of sound.
00:23
So here if we use doppler's expression to get the apparent frequency in terms of the frequency that's emitted, we can conclude what happens to the frequency.
00:35
So as the source is stationary, in that case, the speed of source is zero meter per second, and we have considered the speed of sound in the medium as we.
00:46
So if we use this expression, the frequency that we get f -dash, it will be v -1 -v -o, that's the speed of observer.
00:56
So if the observer is moving to the right, which is away from the source, then the observer is moving in the direction of the sound travel.
01:05
So in this case, vo will have some positive value...