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young's dubble slit experiments 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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In Young's double-slit experiment, white light is used. One slit is covered with a red filter and the other with a green filter. What is observed?
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JEE Mains 2025 8 April Evening Shift (Shift 2)
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In YDSE, the 10th bright fringe is 10 mm from the central maximum for wavelength 600 nm. For wavelength 660 nm, the distance of the 10th bright fringe from the central maximum is:
JEE Mains 2025 28 Jan Morning Shift
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Two wavelengths 600 nm and 450 nm simultaneously illuminate the same Young's double-slit arrangement. Starting from the central maximum, the first non-central position where bright fringes of both wavelengths coincide corresponds to the m₁-th maximum of 600 nm light and the m₂-th maximum of 450 nm light. Find m₁+m₂.
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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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The whole Young's double-slit experiment apparatus is immersed in a liquid of refractive index μ. What happens to the fringe width?
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JEE Main 2025 (Online) 22 jan morning Shift
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In a Young's double-slit experiment, each slit individually produces intensity I and the fringe width is 6 mm. On the positive-y side, point P lies between the third dark fringe and the third bright fringe, and the resultant intensity at P is 3I. If P is N mm above the third dark fringe, find N.
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The physical widths of the two narrow slits in a Young's double-slit experiment are in the ratio 1:2. Assume the wave amplitude contributed by a slit is proportional to its width. What is I(max) ÷ I(min) for the interference pattern?
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In Young's double slit experiment the slits are 0.5 mm apart and the interference is observed on a screen at a distance of 100 cm from the slit. It is found that the 9th bright fringe is at a distance of 7.5 mm from the second dark fringe from the centre of the fringe pattern on same side. Find the wavelength (in nm) of the light used.
JEE Mains
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In YDSE, wavelengths 600 nm and 480 nm are used simultaneously. The minimum order of the bright fringe of 480 nm that coincides with a bright fringe of 600 nm is:
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JEE Mains 2025 24 Jan Morning Shift
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In a Young's double-slit experiment, the phase differences at points P and Q are π/3 and π/2 respectively. The two interfering waves have equal amplitude. The ratio IP:IQ is:
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JEE Mains10 April 2023Shift 2Evening Shift
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