Question

doctor advised 20 lens what is the focal length be find the object from which person is suffering from​

Answer 1

Answer:

Given that the power of lens P = 2D

We know that, P = 100 / f(cm)

2 = 100/f

2f = 100

f = 100/2 = 50 cm

The focal length of the lens = 50 cm

Hope it helps you :)

Answer 2

Answer:

I hope this will help you dear..

Always stay safe and stay healthy..