Waves And Their Phenomena

18 Questions  I  By Victoriaaxox
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  • 1. 
    What is the speed of a radio wave in a vacuum?
    • A. 

      0 m/s

    • B. 

      3.31 x 10^2 m/s

    • C. 

      1.13 x 10^3 m/s

    • D. 

      3.00 x 10^2 m/s


  • 2. 
    If the amplitude of a wave in a rope is doubled, the speed of the wave in the rope will 
    • A. 

      Decrease

    • B. 

      Increase

    • C. 

      Remain the same


  • 3. 
    A change in the speed of a wave as it enters a new medium produces a change in 
    • A. 

      Frequency

    • B. 

      Period

    • C. 

      Wavelength

    • D. 

      Phase


  • 4. 
    A tuning fork oscillates with a frequency of 256 hertz after being struck by a rubber hammer. Which phrase best describes the sound waves produced by this oscillating tuning fork?
    • A. 

      Electromagnetic waves that require no medium for transmission

    • B. 

      Electromagnetic waves that require a medium for transmission

    • C. 

      Mechanical waves that require no medium for transmission

    • D. 

      Mechanical waves that require a medium for transmission


  • 5. 
    In a vacuum, all electromagnetic waves have the same 
    • A. 

      Wavelength

    • B. 

      Frequency

    • C. 

      Speed

    • D. 

      Amplitude


  • 6. 
    Waves pass through a 10 centimeter opening in a barrier without being diffracted. This observation provides evidence that the wavelength of the waves is
    • A. 

      Much shorter than 10 cm

    • B. 

      Equal to 10 cm

    • C. 

      Longer than 10 cm, but short than 20 cm

    • D. 

      Longer than 20 cm


  • 7. 
    A radar gun can determine the speed of a moving automobile by measuring the difference in frequency between emitted and reflected radar waves. this process illustrates
    • A. 

      Resonance

    • B. 

      The Doppler effect

    • C. 

      Diffraction

    • D. 

      Refraction


  • 8. 
    As a sound wave passes from water, where the speed is 1.49 x 10^3 m/s, into air, the wave's speed 
    • A. 

      Decreases and its frequency remains the same

    • B. 

      Increases and its frequency remains the same

    • C. 

      Remains the same and its frequency decreases

    • D. 

      Remains the same and its frequency increases


  • 9. 
    A wave is diffracted as it passes through an opening in a barrier. the amount of diffraction that the wave undergoes depends on both the 
    • A. 

      Amplitude and frequency of the incident wave

    • B. 

      Wavelength and speed of the incident wave

    • C. 

      Wavelength of the incident wave and the size of the opening

    • D. 

      Amplitude of the incident wave and the size of the opening


  • 10. 
    A source of waves and an observer are moving relative to each other. the observer will detect a steadily increasing frequency if 
    • A. 

      He moves toward the source at a constant speed

    • B. 

      The source moves away from him at a constant speed

    • C. 

      He accelerates toward the source

    • D. 

      The source accelerates away from him


  • 11. 
    Which pair of terms best describes light waves traveling from the Sun to Earth?
    • A. 

      Electromagnetic and transverse

    • B. 

      Electromagnetic and longitudinal

    • C. 

      Mechanical and transverse

    • D. 

      Mechnical and longitudinal


  • 12. 
    Radio waves diffract around buildings more than light waves do because, compared to light waves, radio waves 
    • A. 

      Move faster

    • B. 

      Move slower

    • C. 

      Have a high frequency

    • D. 

      Have a longer wavelength


  • 13. 
    The energy of a sound wave is most closely related to its 
    • A. 

      Period

    • B. 

      Amplitude

    • C. 

      Frequency

    • D. 

      Wavelength


  • 14. 
    A girl on a swing may increase the amplitude of the swing's oscillations if she moves her legs at the natural frequency of the swing. This is an example of
    • A. 

      The Doppler effect

    • B. 

      Destructive interference

    • C. 

      Wave transmission

    • D. 

      Resonance


  • 15. 
    An earthquake wave is traveling from west to east through rock. If the particles of the rock are vibrating in a north-south direction, the wave must be classified as
    • A. 

      Transverse

    • B. 

      Longitudinal

    • C. 

      A microwave

    • D. 

      A radio wave


  • 16. 
    Which type of wave requires a material medium through which to travel?
    • A. 

      Electromagnetic

    • B. 

      Infared

    • C. 

      Sound

    • D. 

      Radio


  • 17. 
    A microwave and an x ray are traveling in a vacuum. Compared to the wavelength and period of the microwave, the x ray has a wavelength that is
    • A. 

      Longer and a period that is shorter

    • B. 

      Longer and a period that is longer

    • C. 

      Shorter and a period that longer

    • D. 

      Shorter and a period that is shorter


  • 18. 
    Compared to the speed of microwaves in a vacuum, the speed of x rays in a vacuum is
    • A. 

      Less

    • B. 

      Greater

    • C. 

      The same


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