Hypermetropia is corrected using a convex lens. The focal length is calculated such that an object at the normal near point (25 cm) forms a virtual image at the person's abnormal near point.
What focal length should the spectacles have for a person for whom the least distance of distinct vision is 50 cm ?
Asked in MPSC CS Prelims 2018 · Topic: Optics (Optical Instruments: microscopes, telescopes, human eye)
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