Chapter 24: The Wave Nature Of Light

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Chapter 24: The Wave Nature Of Light - Quiz

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Questions and Answers
  • 1. 
    Which of the following is a false statement?
    • A. 

      All points on a given wave front have the same phase.

    • B. 

      Rays are always perpendicular to wave fronts.

    • C. 

      All wave fronts have the same amplitude.

    • D. 

      The spacing between adjacent wave fronts is one-half wavelength.

  • 2. 
    The wave theory of light is attributed to
    • A. 

      Christian Huygens.

    • B. 

      Isaac Newton.

    • C. 

      Max Planck.

    • D. 

      Albert Einstein.

  • 3. 
    The particle theory of light is attributed to
    • A. 

      Christian Huygens.

    • B. 

      Isaac Newton.

    • C. 

      Max Planck.

    • D. 

      Albert Einstein.

  • 4. 
    When a light wave enters into a medium of different optical density,
    • A. 

      Its speed and frequency change.

    • B. 

      Its speed and wavelength change.

    • C. 

      Its frequency and wavelength change.

    • D. 

      Its speed, frequency, and wavelength change.

  • 5. 
    When a beam of light (wavelength = 590 nm), originally traveling in air, enters a piece of glass (index of refraction 1.50), its frequency
    • A. 

      Increases by a factor of 1.50.

    • B. 

      Is reduced to 2/3 its original value.

    • C. 

      Is unaffected.

    • D. 

      None of the given answers

  • 6. 
    When a beam of light (wavelength = 590 nm), originally traveling in air, enters a piece of glass (index of refraction 1.50), its wavelength
    • A. 

      Increases by a factor of 1.50.

    • B. 

      Is reduced to 2/3 its original value.

    • C. 

      Is unaffected.

    • D. 

      None of the given answers

  • 7. 
    What principle is responsible for light spreading as it passes through a narrow slit?
    • A. 

      Refraction

    • B. 

      Polarization

    • C. 

      Diffraction

    • D. 

      Interference

  • 8. 
    Radio waves are diffracted by large objects such as buildings, whereas light is not noticeably diffracted. Why is this?
    • A. 

      Radio waves are unpolarized, whereas light is plane polarized.

    • B. 

      The wavelength of light is much smaller than the wavelength of radio waves.

    • C. 

      The wavelength of light is much greater than the wavelength of radio waves.

    • D. 

      Radio waves are coherent and light is usually not coherent.

  • 9. 
    What principle is responsible for alternating light and dark bands when light passes through two or more narrow slits?
    • A. 

      Refraction

    • B. 

      Polarization

    • C. 

      Dispersion

    • D. 

      Interference

  • 10. 
    Two light sources are said to be coherent if they
    • A. 

      Are of the same frequency.

    • B. 

      Are of the same frequency, and maintain a constant phase difference.

    • C. 

      Are of the same amplitude, and maintain a constant phase difference.

    • D. 

      Are of the same frequency and amplitude.

  • 11. 
    What do we mean when we say that two light rays striking a screen are in phase with each other?
    • A. 

      When the electric field due to one is a maximum, the electric field due to the other is also a maximum, and this relation is maintained as time passes.

    • B. 

      They are traveling at the same speed.

    • C. 

      They have the same wavelength.

    • D. 

      They alternately reinforce and cancel each other.

  • 12. 
    Two beams of coherent light travel different paths arriving at point P. If the maximum constructive interference is to occur at point P, the two beams must
    • A. 

      Travel paths that differ by a whole number of wavelengths.

    • B. 

      Travel paths that differ by an odd number of half-wavelengths.

  • 13. 
    Two beams of coherent light travel different paths arriving at point P. If the maximum destructive interference is to occur at point P, the two beams must
    • A. 

      Travel paths that differ by a whole number of wavelengths.

    • B. 

      Travel paths that differ by an odd number of half-wavelengths.

  • 14. 
    At the first maxima on either side of the central bright spot in a double-slit experiment, light from each opening arrives
    • A. 

      In phase.

    • B. 

      90° out of phase.

    • C. 

      180° out of phase.

    • D. 

      None of the given answers

  • 15. 
    At the first minima on either side of the central bright spot in a double-slit experiment, light from each opening arrives
    • A. 

      In phase.

    • B. 

      90° out of phase.

    • C. 

      180° out of phase.

    • D. 

      None of the given answers

  • 16. 
    At the second maxima on either side of the central bright spot in a double-slit experiment, light from
    • A. 

      Each opening travels the same distance.

    • B. 

      One opening travels twice as far as light from the other opening.

    • C. 

      One opening travels one wavelength of light farther than light from the other opening.

    • D. 

      One opening travels two wavelengths of light farther than light from the other opening.

  • 17. 
    In a Young's double slit experiment, if the separation between the slits decreases, what happens to the distance between the interference fringes?
    • A. 

      It decreases.

    • B. 

      It increases.

    • C. 

      It remains the same.

    • D. 

      There is not enough information to determine.

  • 18. 
    In a double-slit experiment, it is observed that the distance between adjacent maxima on a remote screen is 1.0 cm. What happens to the distance between adjacent maxima when the slit separation is cut in half?
    • A. 

      It increases to 2.0 cm.

    • B. 

      It increases to 4.0 cm.

    • C. 

      It decreases to 0.50 cm.

    • D. 

      It decreases to 0.25 cm.

  • 19. 
    One beam of coherent light travels path P1 in arriving at point Q and another coherent beam travels path P2 in arriving at the same point. If these two beams are to interfere destructively, the path difference P1 - P2 must be equal to
    • A. 

      An odd number of half-wavelengths.

    • B. 

      Zero.

    • C. 

      A whole number of wavelengths.

    • D. 

      A whole number of half-wavelengths.

  • 20. 
    If a wave from one slit of a Young's double slit experiment arrives at a point on the screen one-half wavelength behind the wave from the other slit, which is observed at that point?
    • A. 

      Bright fringe

    • B. 

      Dark fringe

    • C. 

      Gray fringe

    • D. 

      Multi-colored fringe

  • 21. 
    Why would it be impossible to obtain interference fringes in a double-slit experiment if the separation of the slits is less than the wavelength of the light used?
    • A. 

      The very narrow slits required would generate many different wavelengths, thereby washing out the interference pattern.

    • B. 

      The two slits would not emit coherent light.

    • C. 

      The fringes would be too close together.

    • D. 

      In no direction could a path difference as large as one wavelength be obtained, and this is needed if a bright fringe, in addition to the central fringe, is to be observed.

  • 22. 
    The separation between adjacent maxima in a double-slit interference pattern using monochromatic light is
    • A. 

      Greatest for red light.

    • B. 

      Greatest for green light.

    • C. 

      Greatest for blue light.

    • D. 

      D) the same for all colors of light.

  • 23. 
    The principle which explains why a prism separates white light into different colors is
    • A. 

      Refraction.

    • B. 

      Polarization.

    • C. 

      Dispersion.

    • D. 

      Total internal reflection.

  • 24. 
    The principle which allows a rainbow to form is
    • A. 

      Refraction.

    • B. 

      Polarization.

    • C. 

      Dispersion.

    • D. 

      Total internal reflection.

  • 25. 
    White light is
    • A. 

      Light of wavelength 550 nm, in the middle of the visible spectrum.

    • B. 

      A mixture of all frequencies.

    • C. 

      A mixture of red, green, and blue light.

    • D. 

      The term used to describe very bright light.

    • E. 

      The opposite (or complementary color) of black light.

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