Physics 1320 Mount Exam 2 Practice Problems
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- 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
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