diffraction of light questions with solutions

Showing 1–10 of 30 questions

• MCQeasyWave Opticsdiffraction of light

  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 :

  Options

  • Option A

    2 mm

  • Option B

    2 cm

  • Option C

    0.02 mm

  • Option D

    0.2 mm

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  JEE Mains 2024 30 Jan Morning Shift

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• NumericmediumWave Opticsdiffraction of light

  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.

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  JEE Mains 2024 08 Apr Morning Shift

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• MCQmediumWave Opticsdiffraction of light

  The central maximum of a single-slit diffraction pattern has width 8 mm. The screen distance is increased by 25%, and the slit width is simultaneously decreased by 20%. The wavelength remains unchanged. What is the new central maximum width?

  Options

  • Option A

    8.0 mm

  • Option B

    10.0 mm

  • Option C

    12.5 mm

  • Option D

    15.0 mm

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• MCQeasyWave Opticsdiffraction of light

  Which of the following phenomena does not explain by wave nature of light.

  (A) reflection
  (B) diffraction
  (C) photoelectric effect
  (D) interference (E) polarization

  Choose the most appropriate answer from the options given below :

  Options

  • Option A

    E only

  • Option B

    C only

  • Option C

    B, D only

  • Option D

    A, C only

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  JEE Mains 2024 06 Apr Morning Shift

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• NumericmediumWave Opticsdiffraction of light

  In a single slit experiment, a parallel beam of green light of wavelength 550 nm passes through a slit of width 0.20 mm. The transmitted light is collected on a screen 100 cm away. The distance of first order minima from the central maximum will be x × 10⁻⁵ m. The value of x is :

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  JEE Mains 2024 05 Apr Evening Shift

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• NumericmediumWave Opticsdiffraction of light

  Light of wavelength 500 nm falls normally on a single slit of width 0.20 mm. A screen is placed 2 m from the slit and extends from -22 mm to +22 mm relative to the centre of the pattern. How many diffraction minima are visible on the screen?

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• MCQeasyWave Opticsdiffraction of light

  In a single-slit diffraction experiment, the screen is moved to twice its original distance while wavelength and slit width remain unchanged. Which statement is correct?

  Options

  • Option A

    Angular width doubles and linear width remains unchanged

  • Option B

    Angular width remains unchanged and linear width doubles

  • Option C

    Both angular and linear widths double

  • Option D

    Both remain unchanged

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• NumericdifficultWave Opticsdiffraction of light

  In a single slit diffraction experiment, a slit of width (0.016 ± 0.002) mm is used to measure the wavelength of a monochromatic light source. In the diffraction pattern, the angular distance between the central maximum and first minimum is measured to be (2° ± 40′). The value of the fractional error in the measurement of wavelength is: [Given: sin(2°) = 0.035]

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  JEE Advanced2026Paper 2

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• Multi-correctmediumWave Opticsdiffraction of light

  Which of the following statements correctly distinguish single-slit diffraction from ideal two-source interference?

  Select all that apply

  • Option A

    Interference fringes can have nearly equal widths, whereas the central diffraction maximum is wider than the secondary maxima

  • Option B

    For equal coherent sources, interference maxima can have equal intensities, whereas diffraction secondary maxima become progressively weaker

  • Option C

    Diffraction requires two separate coherent sources

  • Option D

    Diffraction can be understood as interference of secondary wavelets from different parts of the same aperture

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• MCQeasyWave Opticsdiffraction of light

  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?

  Options

  • Option A

    1.25 mrad

  • Option B

    2.5 mrad

  • Option C

    5.0 mrad

  • Option D

    0.625 mrad

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