Q14.Consider the diffraction pattern obtained from the sunlight incident on a pinhole of diameter 0. 1 μm. If the diameter of the pinhole is slightly increased, it will affect the diffraction pattern such that (1) its size increases, and intensity increases (2) its size decreases, and intensity decreases (3) its size decreases, but intensity increases (4) its size increases, but intensity decreases
What This Question Tests
This question tests the understanding of how increasing the diameter of a pinhole affects the size (angular width) and intensity of its diffraction pattern.
Concepts Tested
Formulas Used
Angular width ≈ λ/d
Intensity ∝ (Area)² ∝ d⁴
📚 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
- Diffraction
- Year
- 2021
- Shift
- 25 Feb Shift 2
- Q Number
- Q14
- Type
- MCQ
- NCERT Ref
- Class 12 Physics Ch 10: Wave Optics
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