Question

(a) Define power of a lens and write its S.I. unit. The focal length of a lens is – 50 cm. Find the power and nature of the lens.

(b) An object is placed at a distance of 100 cm from a lens of power -4 D. Find the image distance and magnification.

Answer 1

hey mate.....here is your answer......

I m not giving you the answer of the numericals...