Wave Optics

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Chapter 24 Wave Optics
Conceptual Quiz Questions
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Chapter 24 Wave Optics
The particle theory of light is attributed to
(A) Christian Huygens. (B) Isaac Newton.
(C) Max Planck. (D) Albert Einstein.
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Chapter 24 Wave Optics
When a beam of light (wavelength 590 nm),
originally traveling in air, enters a piece of
glass (index of refraction 1.50), its frequency
(A) increases by a factor of 1.50. (B) is
reduced to 2/3 its original value. (C) is
unaffected. (D) none of the given answers
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Chapter 24 Wave Optics
When a beam of light (wavelength 590 nm),
originally traveling in air, enters a piece of
glass (index of refraction 1.50), its wavelength
(A) increases by a factor of 1.50. (B) is
reduced to 2/3 its original value. (C) is
unaffected. (D) none of the given answers
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Chapter 24 Wave Optics
Radio waves are diffracted by large objects such
as buildings, whereas light is not noticeably
diffracted. Why is this? (A) Radio waves are
unpolarized, whereas light is plane
polarized. (B) The wavelength of light is much
smaller than the wavelength of radio
waves. (C) The wavelength of light is much
greater than the wavelength of radio waves.
(D) Radio waves are coherent and light is
usually not coherent.
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Chapter 24 Wave Optics
In a double-slit experiment, it is observed that
the distance between adjacent maxima on a remote
screen is 1.0 cm. What happens to the distance
between adjacent maxima when the slit separation
is cut in half? (A) It increases to 2.0 cm.
(B) It increases to 4.0 cm. (C) It decreases
to 0.50 cm. (D) It decreases to 0.25 cm.
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Chapter 24 Wave Optics
The separation between adjacent maxima in a
double-slit interference pattern using
monochromatic light is (A) greatest for red
light. (B) greatest for green light. (C)
greatest for blue light. (D) the same for all
colors of light.
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Chapter 24 Wave Optics
White light is (A) light of wavelength 550 nm,
in the middle of the visible spectrum.
(B) a mixture of all wavelengths in the visible
spectrum. (C) a mixture of red, green, and blue
light. (D) the term used to describe very
bright light. (E) the opposite (or
complementary color) of black light.
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Chapter 24 Wave Optics
Light with wavelength slightly shorter than 400
nm is called (A) ultraviolet light. (B)
visible light. (C) infrared light. (D) none
of the given answers
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Chapter 24 Wave Optics
Light with wavelength slightly longer than 750 nm
is called (A) ultraviolet light. (B) visible
light. (C) infrared light. (D) none of the
given answers
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Chapter 24 Wave Optics
Which color of light undergoes the greatest
refraction when passing from air to glass? (A)
red (B) yellow (C) green (D) violet
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Chapter 24 Wave Optics
Two waves having the same amplitude and the same
frequency pass simultaneously through a uniform
medium. Maximum destructive interference occurs
when the phase difference between the two waves
is (A) 0o (B) 90o (C) 180o (D) 360o
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Chapter 24 Wave Optics
What occurs when light passes from water into
glass? (A) Its speed decreases, its wavelength
becomes shorter, and its frequency
remains the same. (B) Its speed decreases, its
wavelength becomes shorter, and its
frequency increases. (C) Its speed increases,
its wavelength becomes longer, and its
frequency remains the same. (D) Its speed
increases, its wavelength becomes longer, and its
frequency decreases.
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END
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Chapter 24 Wave Optics
The principle which allows a rainbow to form is
(A) refraction. (B) polarization. (C)
dispersion. (D) total internal reflection.
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Chapter 24 Wave Optics
In terms of the wavelength of light in magnesium
fluoride, what is the minimum thickness of
magnesium fluoride coating that must be applied
to a glass lens to make it non-reflecting for
that wavelength? (The index of refraction of
magnesium fluoride is intermediate to that of
glass and air.) (A) one-fourth wavelength (B)
one-half wavelength (C) one wavelength (D)
There is no minimum thickness.
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Chapter 24 Wave Optics
A convex lens is placed on a flat glass plate and
illuminated from above with monochromatic red
light. When viewed from above, concentric bands
of red and dark are observed. What does one
observe at the exact center of the lens where the
lens and the glass plate are in direct contact?
(A) a bright red spot (B) a dark spot (C) a
rainbow of color (D) a bright spot that is some
color other than red
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Chapter 24 Wave Optics
We have seen that two monochromatic light waves
can interfere constructively or destructively,
depending on their phase difference. One
consequence of this phenomenon is (A) the
colors you see when white light is reflected from
a soap bubble. (B) the appearance of a
mirage in the desert. (C) a rainbow. (D) the
way in which Polaroid sunglasses work.
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Chapter 24 Wave Optics
Why would it be impossible to obtain interference
fringes in a double-slit experiment if the
separation of the slits is less than the
wavelength of the light used? (A) The very
narrow slits required would generate many
different wavelengths, thereby washing out
the interference pattern. (B) The two slits
would not emit coherent light. (C) The fringes
would be too close together. (D) In no
direction could a path difference as large as one
wavelength be obtained, and this is needed
if a bright fringe, in addition to the
central fringe, is to be observed.
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Chapter 24 Wave Optics
One beam of coherent light travels path P1 in
arriving at point Q and another coherent beam
travels path P2 in arriving at the same point.
If these two beams are to interfere
destructively, the path difference P1 - P2 must
be equal to (A) an odd number of
half-wavelengths. (B) zero. (C) a whole
number of wavelengths. (D) a whole number of
half-wavelengths.
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Chapter 24 Wave Optics
The wave theory of light is attributed to (A)
Christian Huygens. (B) Isaac Newton. (C) Max
Planck. (D) Albert Einstein.
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Chapter 24 Wave Optics
When a light wave enters into a medium of
different optical density, (A) its speed and
frequency change. (B) its speed and wavelength
change. (C) its frequency and wavelength
change. (D) its speed, frequency, and
wavelength change.
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Chapter 24 Wave Optics
At the first maxima on either side of the central
bright spot in a double-slit experiment, light
from each opening arrives (A) in phase. (B)
90 out of phase. (C) 180 out of phase. (D)
none of the given answers
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Chapter 24 Wave Optics
If a wave from one slit of a Young's double slit
experiment arrives at a point on the screen
one-half wavelength behind the wave from the
other slit, which is observed at that point?
(A) bright fringe (B) gray fringe (C)
multi-colored fringe (D) dark fringe
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Chapter 24 Wave Optics
The principle which explains why a prism
separates white light into different colors is
(A) refraction. (B) polarization. (C)
dispersion. (D) total internal reflection.
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Chapter 24 Wave Optics
Which color of light undergoes the smallest
refraction when passing from air to glass? (A)
red (B) yellow (C) green (D) violet
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Chapter 24 Wave Optics
In a single slit diffraction experiment, if the
width of the slit increases, what happens to the
width of the central maximum on a screen? (A)
It increases. (B) It decreases. (C) It
remains the same. (D) There is not enough
information to determine.
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Chapter 24 Wave Optics
Consider two diffraction gratings one has 4000
lines per cm and the other one has 6000 lines per
cm. Make a statement comparing the dispersion of
the two gratings. (A) The 4000-line grating
produces the greater dispersion. (B) Both
gratings produce the same dispersion, but the
orders are sharper for the 4000-line
grating. (C) Both gratings produce the same
dispersion, but the orders are sharper
for the 6000-line grating. (D) The 6000-line
grating produces the greater dispersion.
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Chapter 24 Wave Optics
The colors on an oil slick are caused by
reflection and (A) diffraction. (B)
interference. (C) refraction. (D)
polarization.
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Chapter 24 Wave Optics
When a beam of light, which is traveling in air,
is reflected by a glass surface, there is (A)
a 90 phase change in the reflected beam. (B)
no phase change in the reflected beam. (C) a
180 phase change in the reflected beam. (D) a
45 phase change in the reflected beam.
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Chapter 24 Wave Optics
Which of the following is a false statement?
(A) All points on a given wave front have the
same phase. (B) Rays are always perpendicular
to wave fronts. (C) All wave fronts have the
same amplitude. (D) Wave fronts bend when
moving obliquely from one medium to
another.
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A
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B
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C
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D
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