Given,
focal length of convex lens=10cm=0.10 m
Now,Power=1 / (Focal length (in metre) )
So P=1 / 0.10= 10D
A convex lens has a focal length of 10cm. What is the power of the lens?
A lens has a focal length of, -10 cm. What is the power of the lens and what is its nature?