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# How Unit of Power Related to Focal Length of a Lens? - CBSE Class 10 - Science

ConceptRefraction at Spherical Surfaces and by Lenses Power of a Lens

#### Question

How unit of power related to focal length of a lens?

#### Solution

Power is expressed as inverse of focal length, (in metres).

"Power (in Diopters) ="1/"Focal length (in metres)"

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Solution How Unit of Power Related to Focal Length of a Lens? Concept: Refraction at Spherical Surfaces and by Lenses - Power of a Lens.
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