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When you look at an object… (Class 10 Science 2026, Q31)

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ScienceCBSE Class 10 · Board exam 2026, set 31/1/1 · 1 mark · MCQ

CBSE Class 10 Science 2026: question 31

Set in the CBSE Class 10 board exam of 2026, paper 31/1/1, section C, question 31, for 1 mark. Try it first; the hints and our step-by-step solution are below.

Q31 · 1 mark · MCQThe Human Eye and the Colourful World

When you look at an object very close to your eyes, the:

  1. (A)Ciliary muscles of your eye contract and the eye lens becomes thick.
  2. (B)Ciliary muscles of your eye get relaxed and the eye lens becomes thick.
  3. (C)Ciliary muscles of your eye contract and the eye lens becomes thin.
  4. (D)Ciliary muscles of your eye get relaxed and the eye lens becomes thin.

Source: official question paper from cbse.gov.in (PDF). See it in the full 2026 board paper, set 31/1/1.

Hints

Open one hint at a time and try again before the next.

Hint 1

Near objects need more converging power.

Hint 2

A thicker lens has a shorter focal length.

Step-by-step solution

Each step shows the marks it earns, as an examiner would award them. Checked by an independent re-solve from the question paper.

  1. To focus on a nearby object, the eye needs a shorter focal length, that is, a more converging lens.

  2. The ciliary muscles contract, the lens becomes thicker and its focal length decreases. Correct option: (A).

    1 mark

Answer: Option (A)

Where the marks are

  • Ciliary muscles contract and the lens becomes thick (1 mark)

Revise the chapter

Practise this chapterBoard-style questions from The Human Eye and the Colourful World, one at a time, marked against the answer key and marking points.Back to the full paper2026 board paper, set 31/1/1: every question, by section.

The question is transcribed from the official paper; figures are described in words. The solution, hints and chapter tag are ours. Spotted an error? Write tosupport@questionbuddy.in.