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Consider the optical system shown in fig...

Consider the optical system shown in figure. The point source of light S is having wavelength equals to `lambda`. The light is reaching screen only after reflection. For point P to be 2nd maxima, the value of `lambda` would be (`D> > d` and `d> >lambda`)

A

`(12d^(2))/(D)`

B

`(6d^(2))/(D)`

C

`(3d^(2))/(D)`

D

`(24d^(2))/(D)`

Text Solution

Verified by Experts

The correct Answer is:
A

At `P,Deltax=((8d)xx3d)/(D)` for `2^(nd)` maxima `Deltax=2lamdaimplies(24d^(2))/(D)=2lamda=(12d^(2))/(D)`
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