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Solution - Refraction at Spherical Surfaces and by Lenses - Power of a Lens

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ConceptRefraction at Spherical Surfaces and by Lenses - Power of a Lens  

Question

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

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Solution for concept: Refraction at Spherical Surfaces and by Lenses - Power of a Lens. For the course 8th-10th CBSE
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