Question

Two identical waves superimpose on one another, then the beat frequency is

(A) Zero
(B) One
(C) Ten
(D) Infinity​

Answer 1

Answer:

option d

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Answer 2

Explanation:

The resultant wave

y=a1sinωt+a2sin(ωt+ϕ)

y=2sinωt+4sin(ωt+δ)

From equation of wave

a1=2 and a2=4

IminImax=(a1−a2a1+a2)2

=(2−42+4)2

IminImax=436=9.