stc
Doppler effect
Physics - Sound
![Doppler effect Doppler effect](/media/4690/hxos5_fainomenodoppler_nz6_0703a.jpg?anchor=center&mode=crop&width=1280&height=800&rnd=132265033970000000)
A piston plunged into water generates waves of constant frequency. The waves created by the piston are concentric circles that radiate away from it. What happens to the waves when the piston moves sideways?
stc