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Two sources with intensity 9I(0) and 4I(...

Two sources with intensity `9I_(0)` and `4I_(0)` interfere in a medium. Then find the ratio of maximum to the minimum intensity in the interference pattern.

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`I_"max"=(sqrt(9I_0)+ sqrt(4I_0))^2=25I_0`
`I_"min"=(sqrt(9I_0)-sqrt(4I_0))^2=I_0`
`I_"max"/I_"min"=25/1`
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