Question

Doctor advised to use 1d lens ? what is its focal length​

Answer 1

Answer:

100 cm

Explanation:

Given that the power of lens P = 1D

We know that, P = 100 / focal length (cm)

1 = 100 / f

1 × f = 100

f = 100 / 1 = 100 cm

The focal length of the lens = 100 cm.

HOPE IT HELPS! :D

Answer 2

Answer:

f = 100 cm

Explanation:

It is given that,

Power of the lens, P = 1 D

We need to find the focal length of the lens. We know that the power of the lens is equal to the reciprocal of the focal length. It is given by :

$P=\dfrac{1}{f}$

$f=\dfrac{1}{P}$

$f=\dfrac{1}{1}\ m$

or

f = 100 cm

So, the focal length of the lens is 100 cm. Hence, this is the required solution.