Physics 1320 Mount Exam 2 Practice Problems

41 Questions | Total Attempts: 22

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Questions and Answers
  • 1. 
    Light is emitted when
    • A. 

      Atomic nuclei are made to vibrate

    • B. 

      High-frequency sound waves strike matter

    • C. 

      Electromagnetic waves emanate from matter

    • D. 

      Electron clouds of atoms are forced into oscillation

  • 2. 
    The law of reflection holds for
    • A. 

      Both curved and plane mirrors

    • B. 

      Only plane mirrors

    • C. 

      Only curved mirrors

    • D. 

      Neither of these

  • 3. 
    When light reflects from a surface, there is a change in its
    • A. 

      Frequency

    • B. 

      Speed

    • C. 

      Wavelength

    • D. 

      All of these

    • E. 

      None of these

  • 4. 
    A diver shines light up to the surface of a smooth pond at a 10 degree angle to the normal. Some of the light passes into the air above, and the part that reflects back into the water makes an angle to the normal of
    • A. 

      Less than 10 degrees

    • B. 

      10 degrees

    • C. 

      Not enough information to answer

    • D. 

      More than 10 degrees

  • 5. 
    Interference occurs when two (or more) waves meet while traveling along the same medium.
    • A. 

      True

    • B. 

      False

  • 6. 
    Interference can be constructive or destructive.
    • A. 

      True

    • B. 

      False

  • 7. 
    Interference of two waves at a given location results in the formation of a new pattern which has a greater amplitude than either of the two interfering waves.
    • A. 

      True

    • B. 

      False

  • 8. 
    The meeting of a trough of one wave with a trough of another wave results in destructive interference.
    • A. 

      True

    • B. 

      False

  • 9. 
    Young's experiment provided evidence that light exhibits particle-like behavior.
    • A. 

      True

    • B. 

      False

  • 10. 
    The only way for two waves to interfere constructively is for a crest to meet a crest or a trough to meet a trough. 
    • A. 

      True

    • B. 

      False

  • 11. 
    Young's experiment depends upon the use of light from two sources.
    • A. 

      True

    • B. 

      False

  • 12. 
    Refraction results from differences in light's
    • A. 

      Frequency

    • B. 

      Speed

    • C. 

      Incident angles

    • D. 

      All of these

  • 13. 
    The average speed of light is greatest in
    • A. 

      Green glass

    • B. 

      Red glass

    • C. 

      Blue glass

    • D. 

      Orange glass

    • E. 

      Is the same in all of these

  • 14. 
    The critical angle is least in which of the following?
    • A. 

      Vacuum (empty space)

    • B. 

      Water

    • C. 

      Glass

    • D. 

      Diamond

  • 15. 
    A type of lens that spreads out parallel light is a 
    • A. 

      Converging lens

    • B. 

      Diverging lens

    • C. 

      Combination of converging-diverging lens

  • 16. 
    A person standing waist-deep in a swimming pool appears to have short legs because of the light
    • A. 

      Absorption

    • B. 

      Diffraction

    • C. 

      Reflection

    • D. 

      Refraction

    • E. 

      Interference

  • 17. 
    Different colors are dispersed by a prism because different colors in the prism have different
    • A. 

      Frequencies

    • B. 

      Speeds

    • C. 

      Energies

    • D. 

      Directions

    • E. 

      None of these

  • 18. 
    According to Huygen's principle, every point on a wave
    • A. 

      Is a diffraction source

    • B. 

      Is a superposition of every other part of a wave

    • C. 

      Behaves as a source of new waves

    • D. 

      All of these

  • 19. 
    Diffraction is more pronounced through relatively
    • A. 

      Large openings

    • B. 

      Small openings

    • C. 

      Same for each

  • 20. 
    Waves diffract the least when their wavelengths are
    • A. 

      Long

    • B. 

      Short

    • C. 

      Both diffract the same

  • 21. 
    Diffraction is a result of
    • A. 

      Dispersion

    • B. 

      Reflection

    • C. 

      Refraction

    • D. 

      Polarization

    • E. 

      Interference

  • 22. 
    Polarization is a property of 
    • A. 

      Transverse waves

    • B. 

      Longitudinal waves

    • C. 

      Both

    • D. 

      Neither

  • 23. 
    Monochromatic light is light of a single
    • A. 

      Color

    • B. 

      Frequency

    • C. 

      Wavelength

    • D. 

      All of these

  • 24. 
    The spacing between double-slit interference fringes is increased if the slits are
    • A. 

      Narrower

    • B. 

      Closer together

    • C. 

      Wider

    • D. 

      Farther apart

  • 25. 
    If an object is placed inside the focal point of a diverging lens, the image is 
    • A. 

      Virtual, upright and reduced

    • B. 

      Real, upright and reduced

    • C. 

      Virtual, inverted and reduced

    • D. 

      Virtual, upright and enlarged

  • 26. 
    If an object is placed outside twice the focal point of a converging lens, the image is
    • A. 

      Real, inverted and enlarged

    • B. 

      Real, inverted and reduced

    • C. 

      Virtual, inverted and enlarged

    • D. 

      Real, upright and enlarged

  • 27. 
    Fiber optics depend upon the phenomenon of 
    • A. 

      Polarization

    • B. 

      Dispersion

    • C. 

      Diffuse reflection

    • D. 

      Total internal reflection

  • 28. 
    When light passes into a medium that is more optically dense, the light will refract _____ the normal. When light passes a medium in which it travels slower, light will reflect ______ the normal.
    • A. 

      Towards, away from

    • B. 

      Away from, towards

  • 29. 
    Light will undergo total internal reflection only when it is ________. Choose two.
    • A. 

      In the less dense medium traveling towards the more dense medium

    • B. 

      In the more dense medium traveling towards the less dense medium

    • C. 

      In the medium where it travels the slowest, moving towards the medium where it travels fastest

    • D. 

      In the medium where it travels fastest, moving towards the medium where it travels slowest

  • 30. 
    Converging lenses are ______ at the center and _____ at the edges.
    • A. 

      Thickest, thinnest

    • B. 

      Thinnest, thickest

  • 31. 
    Diverging lenses are ______ at the center and _____ at the edges.
    • A. 

      Thickest, thinnest

    • B. 

      Thinnest, thickest

  • 32. 
    When a light wave vibrates in a variety of directions, the light is said to be 
    • A. 

      Transverse

    • B. 

      Polarized

    • C. 

      Unpolarized

  • 33. 
    When a light waves are isolated to a single plane, the light is said to be
    • A. 

      Transverse

    • B. 

      Polarized

    • C. 

      Unpolarized

  • 34. 
    A Polaroid filter polarizes light by
    • A. 

      Re-orienting all the wave vibrations such that they vibrate in a single plane

    • B. 

      Blocking part of the vibrations while letting through those that are in a specific plane

  • 35. 
    How must the axes of polarization be oriented in order to block road glare?
    • A. 

      Vertical

    • B. 

      Horizontal

    • C. 

      One lens vertical one horizontal

  • 36. 
    When two pulses meet up with each other while moving through the same medium, they have a tendency to bounce off each other and return back to their origin.
    • A. 

      True

    • B. 

      False

  • 37. 
    Constructive interference occurs when a crest meets up with another crest at a given location along the medium.
    • A. 

      True

    • B. 

      False

  • 38. 
    Destructive interference occurs when a pulse with an amplitude of +5 units interferes with a pulse with an amplitude of -5 units.
    • A. 

      True

    • B. 

      False

  • 39. 
    Destructive interference occurs when a trough meets up with another trough at a given location along the medium.
    • A. 

      True

    • B. 

      False

  • 40. 
    If a pulse with an amplitude of +5 units interferes with a pulse with an amplitude of +3 units, the resulting amplitude of the medium will be +4 units - the average of the two individual amplitudes.
    • A. 

      True

    • B. 

      False

  • 41. 
    If a pulse with an amplitude of +5 units interferes with a pulse with an amplitude of -3 units, then neither constructive nor destructive interference occurs.
    • A. 

      True

    • B. 

      False