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A luminous object is separated from a sc...

A luminous object is separated from a screen by distance d. A convex lends is placed between the object and the screen such that it forms a distinct image on the screen. The maximum possible focal length of this convex lens is.

A

`4d`

B

`2d`

C

`d//2`

D

`d//4`

Text Solution

Verified by Experts

The correct Answer is:
D
From lens displacement method, `f_(max) = (d)/(4)`.
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