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A Young's double-slit… (Class 12 Physics 2024, Q10)

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PhysicsCBSE Class 12 · Board exam 2024, set 55/5/1 · 1 mark · MCQ

CBSE Class 12 Physics 2024: question 10

Set in the CBSE Class 12 board exam of 2024, paper 55/5/1, section A, question 10, for 1 mark. Try it first; the hints and our step-by-step solution are below.

Q10 · 1 mark · MCQWave Optics

A Young's double-slit experimental set up is kept in a medium of refractive index . Which maximum in this case will coincide with the maximum obtained if the medium is replaced by air ?

  1. (A)
  2. (B)
  3. (C)
  4. (D)

Source: official question paper from cbse.gov.in (PDF). See it in the full 2024 board paper, set 55/5/1.

Hints

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

Hint 1

Wavelength in a medium is λ/μ.

Hint 2

Equate positions of the two maxima.

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. Position of th maximum ; in medium .

    ½ mark

  2. . Option (C).

    ½ mark

Answer: 8th maximum, option (C)

Where the marks are

  • Uses reduced wavelength in medium to get n = 8 (1 mark)

Revise the chapter

  • Chapter: Wave Optics (notes, formulas, where marks are lost and every past question)
Practise this chapterBoard-style questions from Wave Optics, one at a time, marked against the answer key and marking points.Back to the full paper2024 board paper, set 55/5/1: 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.