Assume that a police siren emits sound of wavelength 2 cm If

Last updated: 6/7/2023

Assume that a police siren emits sound of wavelength 2 cm If an observer moving with a speed 20 m s approaches a stationary police jeep which with its siren switched on then the wavelength observed by the observer will be 0 5 m 1 cm 4 cm 2 cm