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The near point of a person suffering from hypermetropia is at 50 cm from is eye. what is the nature and power of the lens needed to correct this defect

Posted by Savitoj Kaur 2 years, 2 months ago

CBSE > Class 10 > Science

2 answers

Student Cbse 2 years, 1 month ago

The nature of lens is convex lens that is converging lens and the power is +2 diopter

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Pratyush Bidhar 2 years, 2 months ago

Use app Login Class 12 >>Physics >>Ray Optics and Optical Instruments >>Defects of Vision and Correction >>The near - point of a person suffering f Question The near-point of a person suffering from hypermetropia is at 50 cm from his eye. What is the nature and power of the lens needed to correct this defect? (Assume that the near-point of the normal eye is 25 cm). Medium Open in App Updated on : 2022-09-05 Solution Verified by Toppr The person needs a convex lens to rectify this defect. Calculation of power of the lens: This hypermetropic eye can see the nearby object kept at 25 cm clearly if the image is formed at its own near point i.e. 50 cm. Object distance, u=−25 cm Image distance, v=−50 cm v1−u1=f1 −501−−251=f1 f=+50 cm P=f(in cm)100=50100=+2D

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CBSE > Class 10 > Science