The two interfering waves have intensities in the ratio 9 : 4. The ratio of intensities of maxima and minima in the interference pattern will be 

(1) 1 : 25

(2) 25 : 1

(3) 9 : 4

(4) 4 : 9

(2) ImaxImin=I1I2+1I1I212=94+19422=251

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