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Young's Double-Slit Experiment (YDSE) 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.
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- NumericeasyWave Optics
Two wavelengths λ₁ and λ₂ are used in Young's double slit experiment λ₁ = 450 nm and λ₂ = 650 nm. The minimum order of fringe produced by λ₂ which overlaps with the fringe produced by λ₁ is n. The value of n is ____.
JEE Mains 2024 04 Apr Morning Shift
Open question & full solution → - NumericmediumWave Optics
A beam of light consisting of wavelengths 650 nm and 550 nm illuminates the Young’s double slits with separation of 2 mm such that the interference fringes are formed on a screen, placed at a distance of 1.2 m from the slits. The least distance of a point from the central maximum, where the bright fringes due to both the wavelengths coincide, is ______ × 10⁻⁵ m.
JEE Mains 202628 January Evening Shift
Open question & full solution → - MCQmediumWave Optics
In a Young's double-slit experiment, the two slits individually produce equal intensity I. Point P is on the positive-y side between the third dark fringe and the third bright fringe. If the resultant intensity at P is I, what is the position of P in terms of fringe width β?
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JEE MainsNEETJEE Advanced
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In a Young's double-slit interference experiment, the width of one slit is half the width of the other slit. The ratio of maximum to minimum intensity in the interference pattern is:
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JEE Mains 2025 3 April Evening Shift
Open question & full solution → - A/RmediumWave Optics
Choose the correct option for the following Assertion (A) and Reason (R).
Assertion
When a complete Young's double-slit arrangement is immersed in water, the fringe width decreases.
Reason
The frequency of light remains unchanged on entering water, but its wavelength becomes smaller.
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JEE MainsNEETJEE Advanced
Open question & full solution → - IntegermediumWave Optics
In a single-slit diffraction pattern produced using light of wavelength 628 nm, the measured angular separation between the second minimum to the left of the central maximum and the third minimum to the right is 30°. Find the slit width in μm.
JEE Mains 2025 2 April Morning Shift
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In a Young's double-slit experiment, the screen distance is doubled while the slit separation is tripled. The wavelength remains unchanged. If the original fringe width is β, what is the new fringe width?
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JEE MainsNEETJEE Advanced
Open question & full solution → - NumericdifficultWave Optics
In Young's double-slit experiment, two glass wedges A and B with refractive indices 1.7 and 1.5 are placed in front of the slits as shown. Slit separation d = 2 mm, screen distance D = 2 m, total wedge thickness t = 12 μm, and l = 1 mm. Neglect refraction at the slanted interface. Find the shift of the central maximum in mm.
JEE Advanced 2025 Paper 2
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In a Young's double-slit experiment, the slit separation is doubled while the wavelength and screen distance remain unchanged. What happens to the fringe width?
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JEE MainsNEETJEE Advanced
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In a Young's double-slit experiment, the individual intensities contributed by the two slits at a point are I and 4I. What are the maximum and minimum possible resultant intensities?
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JEE MainsNEETJEE Advanced
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