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Wave Optics Test - 63
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Wave Optics Test - 63
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  • Question 1/10
    4 / -1
    Two light rays having the same wavelength λ in vacuum are in phase initially. Then, the first ray travels a path L1 through a medium of refractive index n1 while the second ray travels a path of length L2 through a medium of refractive index n2. The two waves are then combined to produce interference. The phase difference between the two waves is
    Solutions

  • Question 2/10
    4 / -1
    Using the expression 2d sin θ = λ, one calculates the value of d by measuring the corresponding angles θ in the range 0 to 90°. The wavelength λ is exactly known and the error in θ is constant for all values of θ. As, increases from 0°
  • Question 3/10
    4 / -1
    The condition for diffraction of mth order minima is
  • Question 4/10
    4 / -1

    Solutions

  • Question 5/10
    4 / -1

  • Question 6/10
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    Wave property of electrons implies that they will show diffraction effects. Davisson and Germer demonstrated this by diffracting electrons from crystals. The law governing the diffraction from a crystal is obtained by requiring that electron waves reflected from the planes of atoms in a crystal interfere constructively (see figure).

  • Question 7/10
    4 / -1
    In Fraunhofer diffraction experiment, L is the distance between screen and the obstacle, b is the size of obstacle and λ is wavelength of incident light. The general condition for the applicability of raunhofer diffraction is
  • Question 8/10
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    Following diffraction pattern was obtained using a diffraction grating using two different wavelengths λ1 and λ2. With the help of the figure identify which is the longer wavelength and their ratios?

  • Question 9/10
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    In a Fraunhofer diffraction experiment at a single slit using a light of wavelength 400 nm, the first minimum is formed at an angle of 30°. The directipn θ of the first secondary maximum is given by
  • Question 10/10
    4 / -1

    Solutions

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