In a theoretical wave that does not need a medium, not necessarily EM.(adsbygoogle = window.adsbygoogle || []).push({});

the speed of the wave is given by : v=fl

where f is frequency and l is lamda, wave length

suppose there is a stationary wave generator, we can easily measure f and l from any arbitrary point.

if we move towards the generator we will experience a Doppler effect, lets say, we move in such a way that we hear the frequency 2f. by doing this, the wavelength we detect become 0.5l and thus the speed is still v. so shouldn't any wave have a constant speed disregarding the frame of reference?

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

Dismiss Notice

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!

# Speed of wave

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