Question

the focal length of a convex lens is 40 cm calculate the power of lens​

Answer 1

Answer:

So, Power of convex lens is + 2.5 D.

Explanation:

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Answer 2

Hello mate..

Question:

The focal length of a convex lens is 40 cm. Calculate the power of lens.

Solution:

Focal length = 40 cm => 0.4m

$</strong><strong>Power \: of \: lens \: (p) \: = \: \frac{1}{f}</strong><strong> </strong><strong>$

Where,

• f = focal length.

$p \: = \: \frac{1}{0.4}$

$p \: = \: 2.5D$

Where,

• D = Dipoter.

Therefore, power of lens = 2.5D

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