Question

What are beats? Prove that the number of beats per second is equal to the difference between the frequencies
of the two superimposing waves.​

Answer 1

Answer:

In acoustics, a beat is an interference pattern between two sounds of slightly different frequencies, perceived as a periodic variation in volume whose rate is the difference of the two frequencies. With tuning instruments that can produce sustained tones, beats can be readily recognized.

Explanation:

The third maximum at t3 = 2/n1 – n2 and so on. Hence the number of beats produced per second is equal to the reciprocal of the time interval between two successive maxima. Hence, the number of beats produced per second is equal to the reciprocal of time interval between two successive superimposing waves.