An object is mounted on a wall. Its image of equal size is to be obtained on a parallel wall with the help of a convex lens placed between these walls. The lens is kept at distance \(x\) in front of the second wall. The required focal length of the lens will be:
1.
less than \(\dfrac x4\)
2.
more than \(\dfrac x4\) but less than \(\dfrac x2\)
3.
\(\dfrac x2\)
4.
\(\dfrac x4\)
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Subtopic: Â Refraction at Curved Surface |
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