Question
Thu February 21, 2013 By:
 

Sir, will the focal length of a concave mirror or a convex lens be constant for objects at different distances?

Expert Reply
Fri February 22, 2013
focal length of a concave mirror or a convex lens be constant for a given pair of medium(ie the medium of the lens wrt the outside medium).
It has nothing to do with the object distance.
Sat September 23, 2017

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