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Why is the concave lens used… (Class 10 Science 2026, Q34b)

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ScienceCBSE Class 10 · Board exam 2026, set 31/2/1 · 2 marks · Very short answer

CBSE Class 10 Science 2026: question 34(b)

Set in the CBSE Class 10 board exam of 2026, paper 31/2/1, section C, question 34(b), for 2 marks. Try it first; the hints and our step-by-step solution are below.

Q34(b) · 2 marks · Very short answerThe Human Eye and the Colourful World

Why is the concave lens used as a corrective lens for a myopic eye ?

Source: official question paper from cbse.gov.in (PDF). See it in the full 2026 board paper, set 31/2/1.

Hints

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

Hint 1

Where does the image of a distant object form in a near-sighted eye?

Hint 2

To push the image farther back, should the rays be converged or diverged before entering the eye?

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. In a myopic (near-sighted) eye, the image of a distant object is formed in front of the retina.

    1 mark

  2. A concave (diverging) lens of suitable power diverges the incoming rays slightly before they enter the eye. This moves the image back onto the retina, so distant objects are seen clearly.

    1 mark

Answer: Myopic eye forms the image in front of the retina; a concave (diverging) lens of suitable power shifts it back onto the retina.

Where the marks are

  • States the image forms in front of the retina in myopia (1 mark)
  • A concave/diverging lens brings the image back onto the retina (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 31/2/1: 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.