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The equation of two light waves are y(1)...

The equation of two light waves are `y_(1)=6cosomegat,y_(2)=8cos (omegat+phi)`.The ratio of maximum to minimum intensities produced by the supersposition of these waves will be-

A

`49 : 1`

B

`1 : 49 `

C

`1 : 7`

D

`7:1`

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