Question

when source is moving & listher is stational then do find the frequency listner. ​

Answer 1

Answer:

Let the speed of sound in air be v i.e v

sound

=v

Thus the velocity of source v

source

=

10

v

Let ν and ν

′

be the real frequency of the source and apparent frequency heard by the observer respectively.

Using Doppler effect when the source is moving towards the stationary observer :

∴ ν

′

=ν[

v

sound

−v

source

v

sound

]

ν

′

=ν[

v−

10

v

v

]=

9

10

ν ⟹

ν

ν

′

=

9

10