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A converging lens of focal length 20cman...

A converging lens of focal length `20cm`and diameter`5cm`is cut along the line`AB`.The part of the lens shown shaded in the diagram is now used to form an image of a point `P`placed `30cm`away from it on the line`XY`.Which id perpendicualr to the plane of the lens.The image of`P`will be formed.

A

`0.5cm`and above `XY`

B

`1cm` below`XY`

C

on`XY`

D

`1.5cm`below`XY`

Text Solution

Verified by Experts

The correct Answer is:
D

`(h_(I))/(h_(O))=(f)/(u+f)`
`h_(O)=(20)/((-30)+20)xx0.5`
`h_(O)=-1cm`
So image will be formed`1.5cm` below xy line.
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