Physics - Sound Wave Question with Solution | TestHub
Statement-1: When a sound source moves towards a stationary observer, the apparent frequency heard by the observer increases because the wavelength of the sound waves reaching the observer decreases.
Statement-2: The Doppler effect for sound waves depends on the relative velocity between the source and the observer, but not on their individual velocities with respect to the medium.
Options:
Answer:
Solution:
Statement-1 is true. When a source moves towards a stationary observer, the sound waves are compressed in the direction of motion, leading to a decrease in wavelength and consequently an increase in apparent frequency.
Statement-2 is false. Unlike the Doppler effect for light, the Doppler effect for sound is asymmetric and depends on the individual velocities of the source and observer relative to the medium. The formula for apparent frequency explicitly includes velocities of source and observer with respect to the medium, not just their relative velocity.
