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Mechanical Properties Of Fluids

Question
CBSEENPH11018870

Two coherent waves of intensities I1 and I2 interfere. What is the ratio of maximum to minimum intensity in interference pattern?

Solution

Ratio of maximum to minimum intensity in interference pattern is given by, 
straight I subscript max over straight I subscript min space equals space open parentheses square root of straight I subscript 1 end root plus square root of straight I subscript 2 end root close parentheses squared over open parentheses square root of straight I subscript 1 end root minus square root of straight I subscript 2 end root close parentheses squared