Option C is correct. A person moves away from a stationary sound source, the sound perceived by the person will be of the lower pitch and longer wavelength.
The distance between two successive troughs or crests is known as the wavelength. The peak of the wave is the highest point, while the trough is the lowest.
The wavelength is also defined as the distance between two locations in a wave that have the same oscillation phase.
The length of a wave is measured in its propagation direction. The wavelength is measured in meters, centimeters, nanometers, and other units since it is a distance measurement.
The relationship between the wave's wavelength, frequency, and speed is given as
wavelength = speed of light / frequency
As the person moves away from a stationary sound source, then the value of pitch is decreasing. On the other hand, sound needs a longer wavelength to travel.
Hence Option C is correct.
To learn more about the wavelength, refer to the link;
brainly.com/question/7143261
