Question

A person moves away from a stationary sound source. Which phrase describes the sound perceived by the person?(1 point)

lower pitch and longer wavelength

higher pitch and shorter wavelength

higher pitch and longer wavelength

lower pitch and shorter wavelength

Answer 1

lower pitch and longer wavelength

Explanation: moving away reduces the observed frequency (Doppler effect), so the pitch is lower. Since v = fλ for sound in a medium, a lower frequency corresponds to a longer wavelength.