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A lens of focal length f is cut along th...

A lens of focal length f is cut along the diameter into two identical halevs. In this process, a layer of the lens t in thickness is lost, then the halves are put together to form a composite lens. In between the focal plane and the composite lens, a narrow slit is placed near the focal plane. The slit is emitting monochromatic `lambda`. Behind the lens, a screen is located at a distance L front it.

The expression for the number of visible maxima which are obtained through above said arrangement will turn out to be

A

`(Lt^(2))/(lambda f^(2))`

B

`(2Lt^(2))/(lambda f^(2))`

C

`(Lt)/(2lambda f^(2))`

D

`(Lt^(2))/(2lambda f^(2))`

Text Solution

Verified by Experts

The correct Answer is:
C
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