Question
Tue February 12, 2013 By: Rajarshi Basu

Pratap focused a tree just outside the window of laboratory with the help of convex lens so as to find its focal length.Nitinwants to perform the same experiment by focusing a tree near school gate. for this purpose he shall have to move the screen: A)Towards the lens B)Away from lens C)Towards the tree while keeping it between lens and tree D)Away from tree while keeping it between lens and tree

Expert Reply
Wed February 13, 2013
b) away from the lens.
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