Question

The power of a lens is -40, what is its focal length?​

Answer 1

Given:-

Power of Lens ⇒ -40

To Find:-

Focal length

Formulae using :-

$Power = \frac{1}{Focal Length}$

Explanation:-

⇒ Power = 1 / Focal Length

⇒ ( -40) = $\frac{1}{Focal Length}$

⇒ ( -40 ) × Focal Length = 1

⇒ Focal Length =  $\frac{1}{-40}$   ⇒  $\frac{-1}{40}$

⇒ Focal Length = -0.025

Here's your Answer...

⤵️⤵️⤵️⤵️⤵️⤵️

✔✔ ✔✔ Focal Length = - 0.025 ✔✔ ✔✔

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Hope It Helps You ! :D

By Abhiram5566