Chapter 26: Properties Of Light

45 Questions | Attempts: 1398

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Light Quizzes & Trivia

Questions and Answers
  • 1. 
    Most of the waves in the electromagnetic spectrum are
    • A. 

      Red light.

    • B. 

      Blue light.

    • C. 

      Green light.

    • D. 

      Invisible.

  • 2. 
    Electromagnetic waves consist of
    • A. 

      Compressions and rarefactions of electromagnetic pulses.

    • B. 

      Oscillating electric and magnetic fields.

    • C. 

      Particles of light energy.

    • D. 

      High-frequency gravitational waves.

  • 3. 
    The fact that light travels at 300,000 km/s is a consequence of
    • A. 

      Electromagnetic wave propagation.

    • B. 

      Electromagnetic field induction.

    • C. 

      Maxwell's laws.

    • D. 

      Energy conservation.

    • E. 

      None of these

  • 4. 
    The source of all electromagnetic waves is
    • A. 

      Changes in atomic energy levels.

    • B. 

      Vibrating atoms.

    • C. 

      Accelerating electric charges.

    • D. 

      Crystalline fluctuations.

    • E. 

      None of these

  • 5. 
    The main difference between a radio wave and a light wave is its
    • A. 

      Speed.

    • B. 

      Wavelength.

    • C. 

      Frequency.

    • D. 

      All of these

    • E. 

      Two of these

  • 6. 
    Which of these electromagnetic waves has the shortest wavelength?
    • A. 

      Radio waves

    • B. 

      Infrared waves

    • C. 

      X-rays

    • D. 

      Ultraviolet waves

    • E. 

      Light waves

  • 7. 
    Compared to ultraviolet waves, the wavelength of infrared waves is
    • A. 

      Shorter.

    • B. 

      Longer.

    • C. 

      The same.

  • 8. 
    Compared to radio waves, the velocity of visible light waves in a vacuum is
    • A. 

      Less.

    • B. 

      More.

    • C. 

      The same.

  • 9. 
    If an electric charge is shaken up and down
    • A. 

      Sound is emitted.

    • B. 

      Light is emitted.

    • C. 

      Electron excitation occurs.

    • D. 

      A magnetic field is created

    • E. 

      Its mass decreases.

  • 10. 
    If an electron vibrates up and down 1000 times each second, it generates an electromagnetic wave having a
    • A. 

      Period of 1000 s.

    • B. 

      Speed of 1000 m/s.

    • C. 

      Wavelength of 1000 m.

    • D. 

      Frequency of 1000 Hz.

    • E. 

      Wavelength of 1000 km.

  • 11. 
    Which of the following is fundamentally different from the others?
    • A. 

      Sound waves

    • B. 

      X-rays

    • C. 

      Gamma rays

    • D. 

      Light waves

    • E. 

      Radio waves

  • 12. 
    The natural frequency of the atoms in glass is in the
    • A. 

      Infrared part of the spectrum.

    • B. 

      Visible part of the spectrum.

    • C. 

      Ultraviolet part of the spectrum.

  • 13. 
    When ultraviolet light is incident upon glass, atoms in the glass
    • A. 

      Are forced into vibration.

    • B. 

      Resonate.

    • C. 

      Pass the light energy along practically undiminished.

    • D. 

      Freely absorb and re-emit most of the ultraviolet light.

  • 14. 
    When visible light is incident upon clear glass, atoms in the glass
    • A. 

      Are forced into vibration.

    • B. 

      Resonate.

    • C. 

      Convert the light energy into internal energy.

  • 15. 
    Consider light energy that is momentarily absorbed in glass and then re-emitted. Compared to the absorbed light, the frequency of the re-emitted light is
    • A. 

      Considerably less.

    • B. 

      Slightly less.

    • C. 

      The same.

    • D. 

      Slightly more.

    • E. 

      Considerably more.

  • 16. 
    The speed of light in the void between molecules in glass is
    • A. 

      More than its speed in a vacuum.

    • B. 

      The same as its speed in a vacuum.

    • C. 

      Less than its speed in a vacuum.

  • 17. 
    Compared to its average speed in air, the average speed of a beam of light in glass is
    • A. 

      More.

    • B. 

      Less.

    • C. 

      The same.

  • 18. 
    Infrared waves are often called heat waves because they
    • A. 

      Emanate from relatively hot sources.

    • B. 

      Consist of frequencies lower than those of visible light.

    • C. 

      Induce resonance in molecules and increase internal energy in a substance.

    • D. 

      Are absorbed rather than reflected by the skin.

    • E. 

      Are the predominant waves emitted by the sun.

  • 19. 
    Materials generally become warmer when light is
    • A. 

      Absorbed by them.

    • B. 

      Reflected by them.

    • C. 

      Transmitted by them.

    • D. 

      All of these

    • E. 

      None of these

  • 20. 
    Sunburns are produced by
    • A. 

      Ultraviolet light.

    • B. 

      Visible light.

    • C. 

      Infrared light.

    • D. 

      All of these

    • E. 

      None of these

  • 21. 
    The Earth's atmosphere is transparent to most waves in the
    • A. 

      Infrared part of the spectrum.

    • B. 

      Visible part of the spectrum.

    • C. 

      Ultraviolet part of the spectrum.

    • D. 

      Entire electromagnetic spectrum.

  • 22. 
    A lunar eclipse occurs when the
    • A. 

      Sun passes into Earth's shadow.

    • B. 

      Moon passes into Earth's shadow.

    • C. 

      Earth passes into the sun's shadow.

    • D. 

      Earth passes into the moon's shadow.

  • 23. 
    A solar eclipse occurs when the
    • A. 

      Sun passes into Earth's shadow.

    • B. 

      Moon passes into the Earth's shadow.

    • C. 

      The moon's shadow touches Earth.

  • 24. 
    A partial solar eclipse occurs for people in the sun's
    • A. 

      Umbra.

    • B. 

      Penumbra.

    • C. 

      None of these

  • 25. 
    While Earth is experiencing a total solar eclipse, an observer on the side of the moon facing the Earth would see
    • A. 

      Earth disappear from the sky.

    • B. 

      Earth dim and turn reddish.

    • C. 

      Nothing unusual.

    • D. 

      A tiny dark spot move across the face of Earth.

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