Hi,(adsbygoogle = window.adsbygoogle || []).push({});

I am doing doppler effect and this question wants me to prove that the wavelength perceived by the observer and that of the wave emitted is the same.

I tried doing it but couldn't, so I checked out what they had as an answer:

They said that the wavelength of the emitted wave is: v / f, which I agree with

They said the perceived wavelength is equal to: u + v / f (1 + u/v), which I also agree with.

Now, how they proved that those are equal I don't understand... I tried but I just can't see it. Can anyone help me with the steps involved?

Thanks,

Peter

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Doppler Effect (Proving equal wavelengths )

**Physics Forums | Science Articles, Homework Help, Discussion**