Question

which is the formula for doppler effect
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Answer 1

Answer:

v = Velocity of sound or light in medium, f = Real frequency, f' = Apparent frequency. Doppler effect formula is used to find the apparent frequency and wavelength for the source moving towards the observer and away from the observer or observer moving towards the source or away from the source

Answer 2

Answer:Observed frequency,f'=f(v+-vo)/(v-+vs)

Explanation:

Here is a trick to remember the formula.:

I have put 2 symbols + and - between velocities,just remember"Paas aane pe pehla sign" and use appropriate symbol.

Then remember"Officer upar server neeche",which means velocity of Observer is written up and velocity of Source is written down.