Question

what is doplers effect.........

Answer 1

An increase (or decrease) in the frequency of sound, light, or other waves as the source and observer move towards (or away from) each oth

Answer 2

The Doppler effect is the change in frequency or wavelength of a wave for an observer who is moving relative to the wave source. It is named after the Austrian physicist Christian Doppler, who described the phenomenon in 1842