1.

Focal length of a convex lens is 25cm.its power would be

Answer»

Answer:

0.4 D

Explanation:

FOCAL LENGTH (f)=25 cm

                       = 25/10

                       = 2.5 m

Now,

POWER= 1/f

          = 1/2.5  

           =0.4 Diopter



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