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Q.

Two light beams produce interference pattern to give maxima and minima on the screen. If the intensities of the light beams are in the ratio of 9:4, then the ratio of intensities of maxima and minima is 

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a

9:1

b

25:1

c

5:1

d

3:2

answer is C.

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Detailed Solution

detailed_solution_thumbnail

ImaxImin=I1+I2I1−I22

⇒ImaxImin=I1I2+1I1I2−12

⇒ImaxImin=32+132−12=251

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