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

Two sources with intensity `I_(0)` and `4I_(0)` respectively, interfere at a point in a medium. Find the ratio of
(i) maximum and minimum possible intensities,
(ii) ratio of amplitudes

Text Solution

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`l_(max)=(sqrtl_1+sqrtl_2)^2`
here, `l_1=l_0 and l_2=4l_0`
`therefore I_(max)=(sqrtl_0+sqrt4l_0)^2=9l_0`
and `I_(min)=(sqrtl_1-sqrtl_2)^2=l_0`
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