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 ?

Options

A. 4I
B. I
C. `4I^(2)`
D. `I^(2)`

Answer

A

Explanation

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`