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Young's Double Slit Experiment 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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- A/RmediumWave Optics
Given below are two statements: one is labelled as Assertion A and the other as Reason R.
Assertion
The phase difference of two light wave change if they travel through different media having same thickness, but different indices of refraction
Reason
The wavelengths of waves are different in different media.
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JEE Mains6 April 2023Shift 2Evening Shift
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In Young's double slit experiment, carried out with light of wavelength 5000 Å, the distance between the slits is 0.3 mm and the screen is at 200 cm from the slits. The central maximum is at x = 0 cm. The value of x for third maxima is ______ mm.
JEE Mains 2024 05 Apr Morning Shift
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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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Monochromatic light of wavelength 500 nm is used in Young's double slit experiment. An interference pattern is obtained on a screen. When one of the slits is covered with a very thin glass plate (refractive index = 1.5), the central maximum is shifted to a position previously occupied by the 4th bright fringe. The thickness of the glass-plate is ______ μm.
JEE Mains 2024 09 Apr Evening Shift
Open question & full solution → - NumericmediumWave Optics
In a Young's double slit experiment, the intensity at a point is 1/4th of the maximum intensity, the minimum distance of the point from the central maximum is ________ μm. (Given: λ = 600 nm, d = 1.0 mm, D = 1.0 m)
JEE Mains 2024 09 Apr Morning Shift
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In a double slit experiment shown in figure, when light of wavelength 400 nm is used, dark fringe is observed at P. If D = 0.2 m. the minimum distance between the slits S₁ and S₂ is ______ mm.
JEE Mains 2024 29 Jan Morning Shift
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The width of fringe is 2 mm on the screen in a double slits experiment for the light of wavelength of 400 nm. The width of the fringe for the light of wavelength 600 nm will be:
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JEE Mains8 April 2023Shift 2Evening Shift
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A beam of light consisting of wavelengths 7000 Å and 5500 Å is used in Young's double slit experiment. Slit separation is 2.5 mm and screen distance is 150 cm. The least distance from the central fringe where bright fringes of both wavelengths coincide is n × 10⁻⁵ m. Find n.
JEE Mains6 April 2023Shift 2Evening Shift
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Two light waves of wavelengths 800 nm and 600 nm are used in Young's double slit experiment to obtain interference fringes on a screen 7 m away. If slit separation is 0.35 mm, the shortest distance from central bright maximum where bright fringes of the two wavelengths coincide is ______ mm.
JEE Mains31 January 2023Shift 2Evening Shift
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The width of one of the two slits in a Young's double slit experiment is 4 times that of the other slit. The ratio of the maximum to the minimum intensity in the interference pattern is:
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JEE Mains 2024 04 Apr Evening Shift
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