Q2 of 284 Page 246

Write down the magnification formula for a lens in terms of object distance and image distance. How does this magnification formula for a lens differ from the corresponding formula for a mirror?

Magnification (m) formula for a lens in terms of object distance (u) and image distance (v) is:


Magnification formula for a mirror in terms of object distance (u) and image distance (v) is:



Magnification formula for a mirror has a minus sign (-) but the magnification formula for a lens has no minus sign.


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Write the formula for a lens connecting image distance (), object distance (u) and the focal length (f). How does the lens formula differ from the mirror formula?

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What is the nature of the image formed by a convex lens if the magnification produced by the lens is +3?

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What is the nature of the image formed by a convex lens if the magnification produced by the lens is, - 0.5?