Question

Find the focal length of a lens of power 2.0 d what type of lens is this

Answer 1

Answer:

P=1/f

P=1/2

P=0.5

hope it helps

Answer 2

Explanation:

Power of lens, P= 1/f

P= -2D

f= -1/2 = -0.5 m

A concave lens has a negative focal length. Hence, it is a concave lens.