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Wave from two source, each of same frequ...

Wave from two source, each of same frequency and travelling in same direction, but with intensity in the ratio 4 : 1 interfere. Find ratio of maximum to minimum intensity.

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`I_(max)/I_(min)=((sqrt(I_1)+sqrt(I_2))/(sqrt(I_1)-sqrt(I_2)))^2=((sqrt(I_1)/(sqrt(I_2)+1))/(sqrt(I_1)/(I_2)-1))^2=((2+1)/(2-1))^2=9:1`
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