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

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#### Question

A convex lens forms a real and inverted image of a needle at a distance of 50 cm from it. Where is the needle placed in front of the convex lens if the image is equal to the size of the object? Also, find the power of the lens.

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#### Reference Material

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