Q. 15.0( 4 Votes )

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?

Answer :

the formula for a lens connecting image distance (), object distance (u) and the focal length (f) is


This is also known as the lens formula.


Mirror formula is



The lens formula has a minus sign (-) between 1/v and 1/u whereas the mirror formula has a plus sign (+) between 1/v and 1/u.


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