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Choose the correct… (Class 10 Science SQP 2024-25, Q14)

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ScienceCBSE Class 10 · Sample paper, session 2024-25 · 1 mark · MCQ

CBSE Class 10 Science sample paper 2024-25: question 14

From the official CBSE sample question paper for 2024-25, section A, question 14, for 1 mark. Try it first; the hints and our step-by-step solution are below.

Q14 · 1 mark · MCQThe Human Eye and the Colourful World

Choose the correct option for the colour of rays for A and B.

  1. (A)Ray A: Blue; Ray B: Red
  2. (B)Ray A: Green; Ray B: Yellow
  3. (C)Ray A: Red; Ray B: Violet
  4. (D)Ray A: Violet; Ray B: Indigo

Figure in the paper: White light incident on a glass prism at point X; two emergent dispersed rays labelled A (upper, less deviated) and B (lower, more deviated). See it in the official paper.

Source: official sample paper from cbseacademic.nic.in (PDF). See it in the full Sample paper 2024-25.

Hints

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

Hint 1

Recall the order of colours in the spectrum, VIBGYOR.

Hint 2

Which colour bends the least through a prism?

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 dispersion by a prism, red light deviates the least and violet light deviates the most.

    ½ mark

  2. Ray A is the least deviated, so it is red. Ray B is the most deviated, so it is violet. The answer is option (C).

    ½ mark

Answer: Ray A: Red; Ray B: Violet; option (C)

Where the marks are

  • Applies least deviation for red and greatest for violet, choosing (C) (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 paperSample paper 2024-25: 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.