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Worksheet: Diffraction of Light Waves

Q1:

Which of the following conditions results in the largest diffraction angle when a wave passes through a gap?

  • AThe gap’s width is equal to the speed of the wave multiplied by the periodic time of the wave.
  • BThe gap’s width is equal to the amplitude of the wave.
  • CThe gap’s width is equal to the speed of the wave multiplied by the amplitude of the wave.
  • DThe gap’s width is equal to the wavelength of the wave.
  • EThe gap’s width is equal to the speed of the wave multiplied by the frequency of the wave.

Q2:

Which of the following is a correct definition of diffraction?

  • ADiffraction is the change in wavelength of a wave that passes through an aperture.
  • BDiffraction is the change in direction of a wave that passes from one medium into another with a different density.
  • CDiffraction is the change in direction of a wave that passes close to an object and changes its direction by an angle greater than 90 degrees.
  • DDiffraction is the change in direction of a wave that passes close to an object and changes its direction by an angle smaller than 90 degrees.
  • EDiffraction is the change in speed of a wave that passes through an aperture.