Question

name the type of the lens if its power is -2.0 D find the focal length of the lens​

Answer 1

Answer:

P= -2.0D

Therefore,. P= 1/f

-2=1/f

f = -0.5

The type of lens is concave lens.

Answer 2

Answer:

P=1/F(in m)

F=1/p(in m)

F=1/-2.0(in D)

F=-500m

Focal length of the lens is -500m

(-)sign shows that the lens is concave