WBJEE · Physics · Wave Optics
The intensity of a sound appears to an observer to be periodic. Which of the following can be the cause of it?
- A The intensity of the source is periodic
- B The source is moving towards the observer
- C The observer is moving away from the source
- D The source is producing a sound composed of two nearby frequencies
Answer & Solution
Correct Answer
(D) The source is producing a sound composed of two nearby frequencies
Step-by-step Solution
Detailed explanation
The intensity of a sound source appears be periodic due to (i) source intensity is periodic. (ii) source is producing a sound composed of two nearby frequencies.
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