Question

The intensity of sound is independent of

• A. the distance of source from the observer.
• B. the amplitude of the sound.
• C. the maximum displacement of a particle from its mean position.
• D. the wavelength of the sound.

Answer 1

The correct option is D the wavelength of the sound.

The intensity of sound is defined as the energy passing through a unit area in unit time. The intensity decreases with the distance of the observer from the source and increases as the amplitude of the sound, i.e., the maximum displacement of a particle from its mean position, is increased. However, the intensity of sound is independent of the wavelength of the sound.