alleryTwo sound waves of nearly equal frequencies interfere. Beats are heard with a beat frequency equal to
Athe sum of the two frequencies
Bthe average of the two frequencies
Cthe absolute difference of the two frequencies
Dtwice the difference of the two frequencies
Answer & Solution
Correct answer: C. the absolute difference of the two frequencies
Beat frequency is the rate at which loudness rises and falls due to interference of two close frequencies.
It is given by $|f_1-f_2|$.
**Therefore option C is correct.**
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