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Q5 (CAPF/2021) Science & Technology › Basic Science (Physics, Chemistry, Biology) › Geometrical optics Answer Verified

Which one of the following statements with regard to a short-sighted person is correct?

Result
Your answer: —  Â·  Correct: B
Explanation

A short-sighted person, suffering from myopia, can see near objects clearly but finds distant objects blurred [1]. This refractive defect occurs because the eye's refractive power is too high or the eyeball is too long, causing light rays from distant objects to focus in front of the retina rather than directly on it [1]. To correct this, a concave (diverging) lens is used [1]. The concave lens diverges the incoming parallel light rays before they enter the eye, effectively extending the focal length so that the image is shifted back onto the retina. In contrast, hypermetropia (long-sightedness) involves difficulty seeing near objects and is corrected with a convex (converging) lens. Therefore, the correct statement identifies that a short-sighted person sees near objects clearly and requires a concave lens for correction.

Sources

  1. [1] Science , class X (NCERT 2025 ed.) > Chapter 10: The Human Eye and the Colourful World > What you have learnt > p. 170
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