Free physics question bank
diffraction of light questions with solutions
Practice Wave Optics for JEE Main, JEE Advanced, NEET, and Classes 11–12. Attempt each question, then open it for the full solution.
Showing 1–10 of 32 questions
- MCQmediumWave Optics
In a single-slit Fraunhofer diffraction experiment, the slit width is reduced to half while the incident wave amplitude per unit slit width remains unchanged. Which statement correctly describes the new central diffraction pattern?
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JEE MainsNEETJEE Advanced
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In a single slit diffraction pattern, a light of wavelength 6000 Å is used. The distance between the first and third minima in the diffraction pattern is found to be 3 mm when the screen in placed 50 cm away from slits. The width of the slit is ______ × 10⁻⁴ m.
JEE Mains 2024 29 Jan Evening Shift
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A parallel beam of monochromatic light of wavelength 5000 Å is incident normally on a single narrow slit of width 0.001 mm. The light is focused by convex lens on screen, placed on its focal plane. The first minima will be formed for the angle of diffraction of ________ (degree).
JEE Mains 2024 27 Jan Evening Shift
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A parallel beam of monochromatic light of wavelength 600 nm passes through single slit of 0.4 mm width. Angular divergence corresponding to second order minima would be _____ × 10⁻³ rad.
JEE Mains 2024 08 Apr Morning Shift
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A single-slit diffraction experiment uses bd/D = mλ to determine slit width b. D and d are measured with least counts 1 cm and 1 mm, respectively. λ = 600 nm and m = 3 are exact. For d = 5 mm and D = 1 m, find the absolute error in b in μm.
JEE Advanced 2025 Paper 1
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The diffraction pattern of a light of wavelength 400 nm diffracting from a slit of width 0.2 mm is focused on the focal plane of a convex lens of focal length 100 cm. The width of the 1st secondary maxima will be :
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JEE Mains 2024 30 Jan Morning Shift
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Light of wavelength 500 nm is incident normally on a single slit of width 0.40 mm. What is the approximate angular width of the central diffraction maximum?
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JEE MainsNEETJEE Advanced
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In a single-slit Fraunhofer diffraction pattern, a direction satisfies a sinθ = 3λ ÷ 2. If I₀ is the central maximum intensity, what is I ÷ I₀ at this direction?
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JEE MainsNEETJEE Advanced
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Your biology textbook tells you that a certain structure in the cell has a size of 0.61 μm. You would like to see this structure using orange light with a wavelength of 600 nm. The minimum numerical aperture will be x × 10⁻¹. Then find x.
JEE Mains
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A single slit of width a is illuminated with monochromatic light of wavelength 600 nm. The first minimum occurs at θ = 30°. The slit width a is:
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15 April 2023 Morning Shift
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