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Asked by Neha199200 | 29th Jul, 2008, 05:50: PM

Expert Answer:

The image formed is vitual and highly magnified. So the lens should be a convex lens

Magnification = v/u = size of the image / size of the object = 30/3 = 10 or v/u = 10

According to the question u +v = 11 cm

using these , from the lens formula, 1/v - 1/u = 1/f and applying the sign convention, we find the focal length.


Answered by  | 30th Jul, 2008, 07:59: AM

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