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Positions of minima and maxima on the screen in single slit diffraction

This type of question, asked 11 times: 3 May 2023 S2, 9 May 2023 S1, 11 May 2023 S1, 11 May 2024 S2, 13 May 2024 S2, 14 May 2024 S2, 19 Apr 2025 S2, 22 Apr 2025 S2, 25 Apr 2025 S1, 19 Apr 2026 S1, 20 Apr 2026 S1. All 11 questions below, oldest first.

Try each one first, then open its answer.

  1. Question 1

    3 May 2023 S2

    38
    A screen is placed at 50 cm from a single slit, which is illuminated with light of wavelength 600 nm. If separation between the 1st and 3rd minima in the diffraction pattern is 3 mm then slit width is

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  2. Question 2

    9 May 2023 S1

    47
    Two wavelengths 590 nm and 596 nm of sodium light are used one after other, to study the diffraction taking place at a single slit of aperture 2.4 mm. The distance between the slit and screen is 2 m. The separation between the positions of first secondary maximum of the diffraction pattern obtained in the two cases is

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  3. Question 3

    11 May 2023 S1

    9
    In Fraunhofer diffraction pattern, slit width is 0.5 mm and screen is at 2 m away from the lens. If wavelength of light used is 5500 Å, then the distance between the first minimum on either side of the central maximum is (θ\theta is small and measured in radian)

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  4. Question 4

    11 May 2024 S2

    47
    A beam of light of wavelength 600 nm from a distant source falls on a single slit 1 mm wide and the resulting diffraction pattern is observed on a screen 2 m away. The distance between the first dark fringe on either side of the central bright fringe is

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  5. Question 5

    13 May 2024 S2

    47
    Light of wavelength 5000 Å is incident normally on a slit. The first minimum of the diffraction pattern is observed to lie at a distance of 5 mm from the central maximum on a screen placed at a distance of 2 m from the slit. The width of the slit is

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  6. Question 6

    14 May 2024 S2

    41
    Two wavelengths of sodium light 590 nm and 596 nm are used one after another to study diffraction due to single slit of aperture 2×10−6 m2 \times 10^{-6}\,\text{m}. Distance from slit to screen is 1.5 m. The separation between the positions of first maximum of the diffraction pattern in the two cases is

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  7. Question 7

    19 Apr 2025 S2

    31
    In Fraunhofer diffraction pattern, slit width is 0.2 mm and screen is at 2 m away from the lens. If the distance between the first minimum on either side of the central maximum is 1 cm , the wavelength of light used is

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  8. Question 8

    22 Apr 2025 S2

    32
    In a single slit diffraction pattern, the distance between the plane of the slit and screen is 1.3 m. The width of the slit is 0.65 mm and the second maximum is formed at the distance of 2.6 mm from the center of the screen. The wavelength of light used is

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  9. Question 9

    25 Apr 2025 S1

    13
    In Fraunhofer diffraction pattern, slit width is 0.3 mm and screen is at 1.5 m away from the lens. If wavelength of light used is 4500Å4500\text{Å}, then the distance between the first minimum on either side of the central maximum is [θ\lbrack\theta is small and measured in radian.]

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  10. Question 10

    19 Apr 2026 S1

    142
    In a single slit diffraction pattern, the distance between the plane of the slit and the screen is 1.41.4 m. The width of the slit is 0.660.66 mm. The second maximum is formed at the distance of 2.82.8 mm from the center of the screen. The wavelength of light used is

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  11. Question 11

    20 Apr 2026 S1

    141
    Light of wavelength 580580 nm is incident normally on a slit of width 'aa'. The distance between slit and screen is 2.52.5 m and the distance of the second order maximum from the centre of the screen is 14.514.5 mm in a diffraction pattern. The value of 'aa' is

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