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Class 10 · Science · Chapter 10: The Human Eye and the Colourful World

Class 10 Science Chapter 10: Important & Previous Year Questions – Bihar Board

Bihar Board · NCERT · CBSE

Only board questions that already carry a verified year are listed — BSEB annual exam questions (previous years) and questions from the board's official model set (marked separately, not an annual exam). No year is guessed. Answers are written by Study With Me, not an official answer key.

← Chapter 10: The Human Eye and the Colourful World — full notes, video, questions

🏛️ BSEB 2025 · annual secondary exam (previous year questions)

1BSEB 2025 · board paper · Q9 · page 61 mark

Which phenomena is responsible for the blue colour of the sky?

  1. (A) Refraction
  2. (B) Scattering
  3. (C) Reflection
  4. (D) None of these
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Correct answer: (B) Scattering

Tiny air particles scatter blue (short-wavelength) light the most (lesson 7).

2BSEB 2025 · board paper · Q10 · page 61 mark

The primary colour of light is—

  1. (A) Red
  2. (B) Blue
  3. (C) Green
  4. (D) All of these
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Correct answer: (D) All of these

The three primary colours of light are red, green and blue — so «all of these».

3BSEB 2025 · board paper · Q11 · page 71 mark

Where are large numbers of light-sensitive cells present?

  1. (A) In Cornea
  2. (B) In Pupil
  3. (C) In Retina
  4. (D) None of these
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Correct answer: (C) In Retina

The retina has huge numbers of light-sensitive cells (rods and cones) (lesson 1).

4BSEB 2025 · board paper · Q12 · page 71 mark

Which lens is used for the treatment of farsightedness?

  1. (A) Convex lens
  2. (B) Concave lens
  3. (C) Cylindrical lens
  4. (D) None of these
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Correct answer: (A) Convex lens

In farsightedness (hypermetropia) the image forms behind the retina; a convex lens brings it onto the retina (lesson 2).

5BSEB 2025 · board paper · Q1 · page 262 marks

Why is red colour used in railway signals?

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  • Red light has the longest wavelength.
  • So it is scattered the least by fog, mist and smoke particles.
  • Red light travels far without spreading and is clearly seen from a distance — so danger signals are red (lesson 7).

📄 BSEB model set 2026 (official board model paper, not an annual exam) — important

6BSEB model paper 2026 (not the annual exam) · Q11 · page 61 mark

On which of the following parts is the image of an object formed in the human eye?

  1. (A) Cornea
  2. (B) Iris
  3. (C) Pupil
  4. (D) Retina
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Correct answer: (D) Retina

The eye lens forms an inverted real image on the retina (lesson 1).

7BSEB model paper 2026 (not the annual exam) · Q12 · page 61 mark

The transparent front part of the eye is—

  1. (A) Iris
  2. (B) Cornea
  3. (C) Lens
  4. (D) Retina
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Correct answer: (B) Cornea

The clear bulge at the front of the eye is the cornea; most of the bending of light happens there (lesson 1).

8BSEB model paper 2026 (not the annual exam) · Q13 · page 61 mark

Which defect is corrected by bifocal lens is—

  1. (A) Myopia
  2. (B) Hypermetropia
  3. (C) Presbyopia
  4. (D) None of these
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Correct answer: (C) Presbyopia

When both near and far defects come together — usually in presbyopia — a bifocal lens is used (lesson 3).

9BSEB model paper 2026 (not the annual exam) · Q14 · page 71 mark

Rods cells are sensitive to—

  1. (A) Colour
  2. (B) Bright light
  3. (C) Dim light
  4. (D) None of these
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Correct answer: (C) Dim light

Rod cells respond to the intensity of dim light; cone cells respond to colour (lesson 1).

10BSEB model paper 2026 (not the annual exam) · Q15 · page 71 mark

The blind spot has no—

  1. (A) Cornea
  2. (B) Rods and cones
  3. (C) Pupil
  4. (D) Lens
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Correct answer: (B) Rods and cones

Where the optic nerve leaves the retina there are no rods and cones, so that spot cannot see (lesson 1).

← Chapter 10: The Human Eye and the Colourful World — full notes, video, questions