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The Phenomena of light… (Class 10 Science 2024, Q13)

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ScienceCBSE Class 10 · Board exam 2024, set 31/3/1 · 1 mark · MCQ

CBSE Class 10 Science 2024: question 13

Set in the CBSE Class 10 board exam of 2024, paper 31/3/1, section A, question 13, for 1 mark. Try it first; the hints and our step-by-step solution are below.

Q13 · 1 mark · MCQThe Human Eye and the Colourful World

The Phenomena of light involved in the formation of a rainbow in the sky are

  1. (A)Refraction, dispersion and reflection
  2. (B)Refraction, dispersion and total internal reflection
  3. (C)Dispersion, scattering and reflection
  4. (D)Dispersion, refraction and internal reflection

Source: official question paper from cbse.gov.in (PDF). See it in the full 2024 board paper, set 31/3/1.

Hints

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

Hint 1

Think about what happens to a ray inside a raindrop.

Hint 2

The raindrop acts like a prism and also like a mirror.

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. At the raindrop, sunlight is refracted and dispersed into its colours. It is then reflected internally at the back of the drop, and refracted again as it comes out.

  2. NCERT describes this as dispersion, refraction and internal reflection. Option (D).

    1 mark

Answer: Dispersion, refraction and internal reflection, option (D)

Where the marks are

  • Selects dispersion, refraction and internal reflection (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 paper2024 board paper, set 31/3/1: 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.