Question

A convex lens of focal length +60m then calculate its power.

Answer 1

Answer:

power=1/f=1/60=0.0167 D

Answer 2

Answer:

Power of a lens = reciprocal of its focal length ( in m )

so,

P = 1/f

given:   f = 60 m

now ,

P = 1 / 60 D

P = 0.0166667 D