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# The Focal Length of a Lens is +150 Mm. What Kind of Lens is It and What is Its Power? - CBSE Class 10 - Science

ConceptRefraction at Spherical Surfaces and by Lenses Power of a Lens

#### Question

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

#### 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

Solution The Focal Length of a Lens is +150 Mm. What Kind of Lens is It and What is Its Power? Concept: Refraction at Spherical Surfaces and by Lenses - Power of a Lens.
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