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Science (086) — CBSE Class 10 board question

Q1. [1] § 10.2 DEFECTS OF VISION AND THEIR CORRECTION
Assertion (A) : Myopic eye cannot see distant objects distinctly. Reason (R) : For the correction of myopia converging lenses of appropriate power are prescribed by eye-surgeons.
  1. (A) Both (A) and (R) are true and (R) is the correct explanation of (A).
  2. (B) Both (A) and (R) are true, but (R) is not the correct explanation of (A).
  3. (C) (A) is true, but (R) is false.
  4. (D) (A) is false, but (R) is true.
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2024 31/2/1 Q19
Generated by claude-sonnet-4-6 · 2026-06-15 06:53 · grounding rag
Model Answer

(C) (A) is true, but (R) is false.

Assertion is correct — a myopic eye cannot see distant objects distinctly. However, myopia is corrected by a concave (diverging) lens, not a converging lens. Hence R is false.

Source: Chapter 10, Section 10.2(a)

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Explanation

The key fact to remember: Myopia → concave lens; Hypermetropia → convex (converging) lens. The Reason incorrectly states converging lenses for myopia — that correction applies to hypermetropia. Since A is true but R is false, the answer is (C). Do not confuse the two defects in assertion-reason questions.

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