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Wave Optics Test - 17
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Wave Optics Test - 17
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  • Question 1/10
    4 / -1
    A fringe width of a certain interference pattern is 13 = 0.002 cm. What is the distance of 5th dark fringe from centre?
    Solutions

  • Question 2/10
    4 / -1
    A light source, which emits two wavelengths λ1 = 400 nm and λ2 = 600 am, is used Young's double slit experiment. If recorded fringe widths for λ1 and λ2 are β1 and β2 and the number of fringes for them within a distance y on one side of the central maximum are m1 and m2 respectively, then
  • Question 3/10
    4 / -1
    In a Young's double slit experiment, the slit separation is 1 mm and the screen is lm from the slit. For a monochromatic light of wavelength 500 nm, the distance of 3rd minima from the central maxima is
  • Question 4/10
    4 / -1
    Consider the following statements in case of Young's double slit experiment.
    I. A slit S is necessary, if we use an ordinary extended source of light.
    II. A slit S is not needed, if we use an ordinary but well collimated beam of light.
    III. A slit S is not needed, if we use a specially coherent source of light.
    Which of the above statements are correct?
  • Question 5/10
    4 / -1
    In Young's double slit experiment the two slits are d distance apart. Interference pattern is observed on a screen at a distance D from the slits. A dark fringe is observed on the screen directly opposite to one of the slits. The wavelength of light is
  • Question 6/10
    4 / -1
    Young's double slit experiment is carried out by using green, red and blue light, one colour at time. The fringe widths recorded are βG , βR and βB respectively. Then,
  • Question 7/10
    4 / -1
    In Young's double slit experiment, fringes of width (3 are produced on a screen kept at a distance of 1 m from the slit. When the screen is moved away by 5 × 10-2 m, fringe width changes by 3 × 10-5 m. The separation between the slits is 1 ×10-3 m. The wavelength of the light used is ... nm.
  • Question 8/10
    4 / -1

    Solutions

  • Question 9/10
    4 / -1

  • Question 10/10
    4 / -1
    In an interference experiment, phase difference for points where the intensity is minimum is (n =1, 2, 3, ... )
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