1.

The ratio of intensities of two waves is 16 :9 . If they produce interference , then the ratio of maximum and minimum intensities will be ………….. .

Answer»

`4 : 3`
`49 : 1`
`64 : 27`
`81 : 49`

Solution :Amplitude RATIO `r = sqrt((I_(1))/(I_(2))) = sqrt((16)/(9)) = (4)/(3)`
`(I_("max"))/(I_("max")) = ((r + 1)/(r-1))^(2) = ((4 + 3)/(4 -3 ))^(2) = (49)/(1)`


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