Question

Two superimposing waves are represented by equation y1=2sin 2π(10t-0.4x)and y2=4sin2π(20t-0.8x).ratio of Imax to Imin is

Answer 1

Answer: 9:1

Explanation: see attachment...

Answer 2

Answer: 25:9

Explanation:

Imax : Imin = {(f1A1 +f2A2)/(f1A1- f2A2)}^2

Gen equation. Y= Asin( Omega×t - kx )

Omega= 2πf

By comparing f1= 10 f2= 20

A1=2. A2=4

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