Two waves having the intensities in the ratio of 9;1 produce interference. The ratio of maximum to minimum intensity is equal to

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10 :8

9:1

4:1

2:1

answer is C.

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Detailed Solution

Intensity ratio = =I1I2=91Amplitude ratio +=a1a2=31Ifa1=3 units, then a2=1 unit. At maxima amax=a1+a2=4 At minima amin=a1−a2=2 ImaxImin=amax2amin2=164=41

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