1.

Interference pattern is formed from two coherent sources of same intensity. If intensit of minima is zero, then what will be th intensity of maxima ?

Answer»

4I
I
`4I^(2)`
`I^(2)`

Solution :For MINIMA `I_(MIN)=(SQRT(I_(1))-sqrt(I_(2)))^(2)`
`0=(sqrt(I_(1))-sqrt(I_(2)))^(2)`
`:.sqrt(I_(1))-sqrt(I_(2))`
`:.I_(1)=I_(2)=I` suppose
Now `I_(max)=(sqrt(I_(1))+sqrt(I_(2)))^(2)`
`=(sqrt(I)+sqrt(2))=(2sqrt(I))^(2)= 4I`


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