Wave has simple harmonic motion whose period is 4 seconds while another wave which also possesses simple harmonic motion has its period 3 second. If both are combined, then the resultant wave will have the period equal to

(a) 4 s

(b) 5 s

(c) 12 s

(d) 3 s

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1 Answers

Correct option (c) 12 s

Explanation:

Beats are produced. 

Frequency of beats will be 1/3 -1/4 = 1/12 .

Hence time period = 12 s.

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