Q24.A single slit of width b is illuminated by a coherent monochromatic light of wavelength λ. If the second and fourth minima in the diffraction pattern at a distance 1 cm from the slit are at 3 cm and 6 cm respectively from the central maximum, what is the width of the central maximum? (i.e. distance between first minimum on either side of the central maximum) (1) 4. 5 cm (2) 1. 5 cm (3) 6. 0 cm (4) 3. 0 cm
What This Question Tests
This question tests the understanding of the conditions for minima in single-slit diffraction and how to calculate the width of the central maximum based on the positions of higher-order minima.
Concepts Tested
Formulas Used
b sinθ = mλ
y = D tanθ ≈ Dθ
Width of central maximum = 2y₁
📚 NCERT Sections This Tests
10.4 — In A Young’S Double-Slit Experiment, The Slits Are Separated By
Physics Class 12 · Chapter 10
10.4 In a Young’s double-slit experiment, the slits are separated by 0.28 mm and the screen is placed 1.4 m away. The distance between the central bright fringe and the fourth bright fringe is measured to be 1.2 cm. Determine the wavelength of light used in the experiment.
10.5 — In Young’S Double-Slit Experiment Using Monochromatic Light Of
Physics Class 12 · Chapter 10
10.5 In Young’s double-slit experiment using monochromatic light of wavelength l, the intensity of light at a point on the screen where path difference is l, is K units. What is the intensity of light at a point where path difference is l/3?
10.2 — What Is The Shape Of The Wavefront In Each Of The Following Cases:
Physics Class 12 · Chapter 10
10.2 What is the shape of the wavefront in each of the following cases: (a) Light diverging from a point source. (b) Light emerging out of a convex lens when a point source is placed at its focus. (c) The portion of the wavefront of light from a distant star intercepted by the Earth.
📋 Question Details
- Chapter
- Wave Optics
- Topic
- Single slit diffraction
- Year
- 2017
- Shift
- 08 Apr Online
- Q Number
- Q24
- Type
- MCQ
- NCERT Ref
- Class 12 Physics Ch 10: Wave Optics
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