"A lens can form a magnified erect image as well as magnified inverted image of an object placed in front of it". State the nature of this lens and draw ray diagrams to justify the above statement. Mark the positions of O,F and 2F in the diagram

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TextSpherical Lenses: Convex and ConcaveMyopia or Near-sightednessCorrection of Vision Defects Using LensesCBSE PYQ

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An old person is suffering from an eye defect caused by weakening of ciliary muscles and diminishing flexibility of the eye lens. If the defect of vision is 'a' which can be corrected by lens 'b', then 'a' and 'b' respectively are :

MCQ (Single)PresbyopiaCorrection of Vision Defects Using Lenses

The power of a lens 'X' is – 2·5 D. Name the lens and determine its focal length in cm. For which eye defect of vision will an optician prescribe this type of lens as a corrective lens ?

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