Question

What is the power of diverging lens of focal length 40cm?

Answer 1

Answer:

power is not 2D

Explanation:

it is approx 2.5D

Answer 2

Given,

The focal length of the diverging lens is 40cm

To Find,

Calculating the power of the diverging lens.

Solution,

We can solve this problem by using the following process.

The formula to find the power of the diverging lens is as follows,

Let,

The focal length be f

The power of diverging lens be D

                                             $D = \frac{1}{f}$

Here,

f = 40cm

                                            $D = \frac{1}{40} \\\\D = 0.025cm^{-1}$

Hence, the power of diverging lens is 0.025cm⁻¹