Chapter 29: Light Waves

44 Questions | Total Attempts: 319

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Chapter 29: Light Waves

Questions and Answers
  • 1. 
    According to Huygens' principle, every point on a wave
    • A. 

      Is a diffraction source.

    • B. 

      Behaves as a source of new waves.

    • C. 

      Is the superposition of every other part of the wave.

    • D. 

      All of these

    • E. 

      None of these

  • 2. 
    Consider plane waves incident upon a barrier with a small opening. After passing through the opening, the waves
    • A. 

      Continue as plane waves.

    • B. 

      Fan out.

    • C. 

      Converge.

    • D. 

      Become polarized.

    • E. 

      All of these

  • 3. 
    Diffraction is more pronounced through relatively
    • A. 

      Small openings.

    • B. 

      Large openings.

    • C. 

      Same for each

  • 4. 
    Waves diffract the most when their wavelength is
    • A. 

      Short.

    • B. 

      Long.

    • C. 

      Both diffract the same.

  • 5. 
    The type of radio waves that is diffracted the most around small buildings are
    • A. 

      AM.

    • B. 

      FM.

    • C. 

      Both diffract equally.

  • 6. 
    To perceive greater detail a dolphin emits sounds of
    • A. 

      Lower frequency.

    • B. 

      Higher frequency.

    • C. 

      Higher frequency.

    • D. 

      Greater speed.

    • E. 

      None of these

  • 7. 
    For viewing tiny objects in a microscope, diffraction is
    • A. 

      Helpful.

    • B. 

      A hindrance.

    • C. 

      Not a factor.

  • 8. 
    For radio reception, diffraction is
    • A. 

      Helpful.

    • B. 

      Helpful.

    • C. 

      Not a factor.

  • 9. 
    Diffraction is a result of
    • A. 

      Refraction.

    • B. 

      Reflection.

    • C. 

      Interference.

    • D. 

      Polarization.

    • E. 

      Dispersion.

  • 10. 
    Newton's rings are a demonstration of
    • A. 

      Refraction.

    • B. 

      Refraction.

    • C. 

      Dispersion.

    • D. 

      Polarization.

    • E. 

      Interference.

  • 11. 
    Interference is a property of
    • A. 

      Light waves.

    • B. 

      Sound waves.

    • C. 

      Water waves.

    • D. 

      All of these

    • E. 

      None of these

  • 12. 
    Colors seen when gasoline forms a thin film on water are a demonstration of
    • A. 

      Refraction.

    • B. 

      Reflection.

    • C. 

      Dispersion.

    • D. 

      Polarization.

    • E. 

      Interference.

  • 13. 
    Iridescent colors seen in the pearly luster of an abalone shell are due to
    • A. 

      Refraction.

    • B. 

      Diffraction.

    • C. 

      Dispersion.

    • D. 

      Polarization.

    • E. 

      Interference.

  • 14. 
    Polarization is a property of
    • A. 

      Transverse waves.

    • B. 

      Longitudinal waves.

    • C. 

      Both

    • D. 

      Neither

  • 15. 
    The vibrational direction of the electron and the plane of polarization of the light it emits
    • A. 

      Are the same.

    • B. 

      Are at right angles to each other.

    • C. 

      May or may not be at right angles to each other.

    • D. 

      Are independent of each other.

  • 16. 
    Some double-pane airplane windows darken when the inner pane is rotated. The panes are
    • A. 

      Thin films.

    • B. 

      Thin films.

    • C. 

      Optical fibers.

  • 17. 
    Light will not pass through a pair of Polaroids when their axes are
    • A. 

      Parallel.

    • B. 

      Perpendicular.

    • C. 

      45 degrees to each other.

    • D. 

      45 degrees to each other.

    • E. 

      All of these

  • 18. 
    The glare seen from water is largely
    • A. 

      The glare seen from water is largely

    • B. 

      Vertically polarized.

    • C. 

      Unpolarized.

  • 19. 
    The polarization axes of ordinary sunglasses are
    • A. 

      Vertical.

    • B. 

      Horizontal.

    • C. 

      At right angles to each other.

  • 20. 
    The polarization axes of glasses for 3-D viewing are
    • A. 

      Vertical.

    • B. 

      Horizontal.

    • C. 

      At right angles to each other.

  • 21. 
    Viewing exact duplicates of slides in the left and right positions of a stereo projector produces
    • A. 

      Depth.

    • B. 

      No depth.

  • 22. 
    The function of polarizing filters in viewing 3-D slides or movies is to provide each eye
    • A. 

      The ability to see parallax.

    • B. 

      A balanced intensity.

    • C. 

      An independent left or right-hand view.

    • D. 

      A stereoscopic view.

    • E. 

      With light polarized at right angles to each other.

  • 23. 
    A property of non-cubic transparent crystals is that light travels through them
    • A. 

      In mutually perpendicular directions.

    • B. 

      Without refracting.

    • C. 

      And becomes polarized in the process.

    • D. 

      At different speeds along different optic axes.

    • E. 

      None of these

  • 24. 
    A property of non-cubic transparent crystals is that polarized light that travels through them
    • A. 

      Breaks up into two perpendicular planes.

    • B. 

      Is depolarized.

    • C. 

      Is rotated.

    • D. 

      Slows in speed.

    • E. 

      None of these

  • 25. 
    An inventor proposes to equip an office with a polarized source of background music and let those who prefer not to hear it wear polarizing earplugs. His idea is
    • A. 

      A good one – giving people a choice.

    • B. 

      Too expensive.

    • C. 

      Too much bother.

    • D. 

      Nonsense – you can't polarize a sound wave.

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