33hehhe...
tab kha kar dekhte hainn :P
a converging lens of focal length 20 cm n 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 pt Pplaced 30 cm away frm it on d line XYwhich is prependicular to the plane of lens .the image of P ll be formed at
(a).5 cm above XY
(b)1cm belowXY
(c)on 'Xy
(d)1.5 cm below XY
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10 Answers
33opsie tahts 2 cm from above wo nahi dekhe the....
mujhe laga its from the center...
33The concept here is that..
* Focal length doesn't changes by cutting lens this way in between.
* Principal axis doesn't changes by cutting a lens..