Question

the power of convex lens of focal lenght 25 cm is options 12N,36N,21N,63N​

Answer 1

Answer:

Focal length of the convex lens (f) = 25 cm = 0.25 m

Power=f(in meters)1

P=0.251

P=4D

For a convex lens, power of the lens is positive

Therefore the power of the lens is +4D