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.

0.5 cm above XY

1 cm below XY

on XY

1.5 cm below XY

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