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

Last updated: 6/19/2023

D 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 1 0 5 m 2 1 cm 4 2 cm