Chapter 29: Light Waves
- 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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