Question

a lens has focal length -25 cm. What is the power of the lens and what is its nature

Answer 1

Answer:

Explanation:

f = -25cm = -.25m

p=1/f

=1/-.25=-4D

THE LENS IS diverging

Answer 2

Answer: 4 D

Given: Focal length= 25cm=0.25m

Power=1/ focal length

= 1/0.25

= 100/25

= 20/5

= 4 D

The lens is diverging

Hope it helps you.