For the classical Doppler effect of sound in a stationary medium, which statements are correct?
Select all that apply

Question

For the classical Doppler effect of sound in a stationary medium, which statements are correct?

G1 Physics · Accepted Answer

A moving source changes the spacing of emitted wavefronts. A moving observer changes the rate at which wavefronts are encountered but does not modify the wave pattern already in the medium. Only radial velocity components matter in the usual classical treatment. Combining source and observer motion gives f' = f×(v+uₒ)/(v−uₛ) for mutual approach. Therefore all four statements are correct.