Ho Ho Oh no!
our beloved Santa was sitting in his comfy chair and inspecting gift (consider as point object)
Santa was using a biconvex lens of focal length 20 cm with the gift placed along the principal axis AB at a distance of 40 cm from the lens ...
Santa accidentally knocked down some magical powder and his lens started to float
taking the new principal axis as CD which is parallel to AB
now a new image is formed by the lens at position W with CD as the principal axis
How much is the image of gift raised with respect to the previous axis "AB"?
The answer is 2.
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