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Questions  

The superposing waves are represented by the following equations :
y1=5sin2π(10t0.1x),  y2=10sin2π(20t0.2x)
Ratio of intensities ImaxImin will be 

a
1
b
9
c
4
d
16

detailed solution

Correct option is B

a1=5,  a2=10⇒ImaxImin=(a1+a2)2(a1−a2)2=5+105−102=91

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