Double Slit Diffraction Quiz

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| By Kramayp
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Kramayp
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Quizzes Created: 4 | Total Attempts: 8,542
| Attempts: 715
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  • 1/10 Questions

    The Double Slit Experiment was first performed by Sir Isaac Newton.

    • True
    • False
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About This Quiz

A short quiz on the key concepts in the Double Slit Diffraction Unit. Just type in your name and start the quiz. Answers to all the questions will be presented at the end of the quiz.

Double Slit Diffraction Quiz - Quiz

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  • 2. 

    All the bright and dark fringes in the double slit diffraction pattern are equally spaced.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    If it didn't behave like a wave, then you wouldn't see diffraction patterns, therefore it must behave like a wave.

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  • 3. 

    Double Slit Diffraction doesn't work when the slits are too far apart because all the equations rely on the fact that the distance between the slits is very small compared to the distance between the slits and the screen.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    sin(x) = phase difference / d is only true when the distance between the slits is much smaller than the difference between the slits and the screen.

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  • 4. 

    The equations for double slit interference are exactly the opposite as those for diffration gratings

    • True

    • False

    Correct Answer
    A. False
    Explanation
    The equations are exactly the same as those for gratings except the value of d is different for gratings.

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  • 5. 

    Which of the following is true for antinodes (maxima) in Double Slit Diffraction?

    Correct Answer
    A.
    Explanation
    The derivation to this is explained on the Double Slit Diffraction page on the website.

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  • 6. 

    In Double Slit Interference, there can be an infinite number of dark and bright fringes.

    • True

    • False

    Correct Answer
    A. False
    Explanation
    There is always a limited number of dark and bright fringes. This number depends on the maximum value of n which can be calculated by d/λ.

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  • 7. 

    When does Double Slit Diffraction Occur?

    • When the Slit Width is smaller than λ and distance between Slits is less than λ

    • When the Slit Width is larger than λ and distance between slits is bigger than λ

    • When the Slit Width is smaller than λ and distance between the slits is slightly more than λ.

    • Both A and B

    • None of the Above

    Correct Answer
    A. When the Slit Width is smaller than λ and distance between the slits is slightly more than λ.
    Explanation
    Double Slit Diffraction occurs when the distance between the slits is slightly larger than λ. If the slit width is larger than λ, then single slit diffraction starts occurring and messes up double slit interference.

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  • 8. 

    Red light of wavelength 600 nm passes through two parallel slits. Nodal lines are produced ona screen 3.0 m away. The distance between the 1st and the 10th nodal lines is 5.0 cm. What is the separation of the two slits?

    • 3.24 X 10^-4 m

    • 3.58 X 10^-5 m

    • 4.23 X 10^-4 m

    • 4.48 X 10^-5m

    • None of the Above

    Correct Answer
    A. 3.24 X 10^-4 m
    Explanation
    A similar question is done in the sample problems section of this unit.

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  • 9. 

    Interfringe represents

    • Spaces between antinodes in a diffraction pattern

    • Spaces between nodes in a diffraction pattern

    • Width of the Central Maximum in Double Slit Diffraction

    • The interaction between the particle and wave components of light.

    • Both A and B

    Correct Answer
    A. Spaces between nodes in a diffraction pattern
    Explanation
    Interfringe stands for the spaces between the nodes or the antinodes in a double slit diffraction pattern.

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  • 10. 

    Monochromatic light of wavelength 600nm falls on two parallel narrow slits 400nm apart. A screen is placed 2 meters away. What is the angle of the 3rd order maximum that is created?

    • 28 degrees

    • 34 degrees

    • 16 degrees

    • 18 degrees

    • None of the Above

    Correct Answer
    A. None of the Above
    Explanation
    Since the distance between the slits is smaller than the wavelength of the light, no diffraction occurs. Therefore none of the answers are possible

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Quiz Review Timeline (Updated): Aug 29, 2024 +

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  • Current Version
  • Aug 29, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • Jan 02, 2012
    Quiz Created by
    Kramayp
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