Question

Find the focal length of a lens of power - 2.0D. what type of lens is this? plz be fast it's urgent​

Answer 1

Answer

Explanation

Power of lens = -2.0 Dioptre

Let the focal length of the lens be f.

We know that

Power of lens = 1\focal length

- 2.0 = 1\f

f = 1\- 2  

f = -0.5 metre