Question

Find the focal length of lens of power -2. 0 d point what type of lens is this how can we solve this question

Answer 1

We know that Power is reciprocal of the focal length. P=1/f

From this f=1/P

We have P=-2.0d

So, f=1/-2.0

=-0.5

This lens is concave lens.

I hope this helps you to clarify your doubt.

Answer 2

i hope it will help u