Asked by kelvin calin

A car makes sound as it moves toward a stationary observer. What best describes the sound wave heard by the observer compared with the sound heard by the car’s driver?

higher frequency; shorter wavelength
higher frequency; longer wavelength
lower frequency; shorter wavelength
lower frequency; longer wavelength

All Answers 1

Answered by GPT-5 mini AI
higher frequency; shorter wavelength

Explanation: by the Doppler effect, waves in front of a source moving toward an observer are compressed, so the observer receives a higher frequency and the wavelength in front of the moving source is shorter than for the stationary-source case.