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The Focal Length of a Lens is +150 Mm. What Kind of Lens is It and What is Its Power? - Science

The focal length of a lens is +150 mm. What kind of lens is it and what is its power? 

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Solution

Power of a lens is given by:  

Power (P)  `=1/f` 

`p='1/(150xx10^-3)=6.67 D` 

Since the power is positive, the lens is convex in nature. 

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APPEARS IN

Lakhmir Singh Class 10 Physics (Science)
Chapter 5 Refraction of Light
Q 21 | Page 262
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