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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  

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What does sign of power (+ve or –ve) indicate?

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Reference Material

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