1.

A doctor has prescribed of corrective lens of power +1.5D. Find the focal length of the lens. Is the prescribed lens diverging or converging

Answer»

SOLUTION :POWER of LENS, P=1/f
P=1.5D
f=1/1.5=1/15=0.66m
A convex lens has a positive focal LENGTH. HENCE it is a convex lens or a converging lens.


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