Download Please look over the following review questions

Lesson 9
The Interaction of Light with Atoms and Molecules
Please look over the following review questions and exercises. If you are unsure of the
answers, check your text and then the appendix that follows all the lessons in this
course for the information. Do not submit these to your instructor.
Review Questions
Chapter 26, pages 511–512, questions: 15, 16, 17, 18, 19, 20, 21; Chapter 27, page 529,
questions: 1, 3, 4, 5, 6, 7, 8, 9, 11, 13, 14, 15, 16, 17, 19, 20, 23, 25, 27, 29; and Chapter 30,
page 601, questions: 1, 2, 4, 5, 6, 11, 12, 13, 18, 22, 27, 28, 29, 30.
Exercises
1.
Complementary colors are two colors that
a.
b.
c.
d.
e.
2.
The complementary color of blue is __________.
a.
b.
c.
d.
e.
3.
look good together
are additive primary colors
are subtractive primary colors
produce white light when added together
are right for each other
red
green
yellow
cyan
magenta
Colors on TV result from color __________.
a.
b.
c.
d.
addition
subtraction
either of these
neither of these
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PHYS 001
The Science of Physics
4.
A mixture of red and green pigments appears __________.
a.
b.
c.
d.
e.
5.
A blue object will appear black when illuminated with __________.
a.
b.
c.
d.
e.
6.
magenta
yellow
green
blue
violet
Reflection occurs when outer electrons of atoms
a.
b.
c.
d.
e.
8.
blue light
cyan light
yellow light
magenta light
none of these
If sunlight were green instead of white, the most comfortable color to wear on a
hot day would be __________.
a.
b.
c.
d.
e.
7.
orange
yellow
magenta
blue
blackish-brown
are excited and deexcited, absorbing and emitting photons in all directions
are just excited
only absorb photons
none of these
all of these
To say that energy levels in an atom are discrete is to say the energy levels are
well-defined and
a.
b.
c.
d.
separate from one another
separated from one another by the same energy increments
continuous
private
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Lesson 9
The Interaction of Light with Atoms and Molecules
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PHYS 001
The Science of Physics
9.
Light is emitted when an electron
a.
b.
c.
10.
A throbbing pulse of electromagnetic radiation is called a __________.
a.
b.
c.
d.
e.
11.
the energy given to the atom that emits it
the energy level difference through which it falls
its frequency
all of these
none of these
Which color carries the most energy?
a.
b.
c.
d.
e.
13.
photon
proton
lightron
spaktron
notron
The energy of a photon is related to
a.
b.
c.
d.
e.
12.
is boosted to a higher energy level
makes a transition to a lower energy level
neither of these
red
green
blue
violet
all the same
The greater proportion of energy immediately converted to heat rather than light
occurs in __________.
a.
b.
c.
a fluorescent lamp
an incandescent lamp
both the same
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Lesson 9
The Interaction of Light with Atoms and Molecules
14.
Discrete spectral lines occur when excitation takes place in
a.
b.
c.
d.
e.
15.
Light frequency from an incandescent lamp depends on
a.
b.
c.
d.
e.
16.
absorbed by the sun’s atmosphere
emitted by the sun
not emitted by the sun
Spectral lines take the shape of vertical lines because
a.
b.
c.
d.
e.
18.
the amount of electrical energy transformed
the rate of atomic and molecular vibrations
the voltage applied to the lamp
the transparency of glass
both a and c
The dark lines in the sun’s spectrum represent light that is
a.
b.
c.
17.
a solid
a liquid
a gas
a superconductor
all of these
the light is vertically polarized.
they are simply images of a vertical slit.
the energy levels in the atom are parallel to one another.
all of these
none of these
Astronomers can tell whether a star is approaching or receding from earth by
a.
b.
c.
d.
e.
its temperature
its change in temperature
its emission spectra
the Doppler Effect
all of these
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PHYS 001
The Science of Physics
19.
Atoms can be excited by __________.
a.
b.
c.
d.
e.
20.
The main visible difference between phosphorescent and fluorescent materials is
a.
b.
c.
21.
infrared region
green region
ultraviolet region
The radiation curve for a “blue hot” object peaks in the __________.
a.
b.
c.
d.
24.
atmosphere
surface
interior
The radiation curve for a “red hot” object peaks in the __________.
a.
b.
c.
23.
an afterglow
a difference in brightness
the greenish color of phosphorescence
The fact that iron absorption lines occur in the solar spectrum directly indicates
there is iron in the solar __________.
a.
b.
c.
22.
thermal agitation
electron impact
photon impact
all of these
none of these
infrared region
red region
yellow region
ultraviolet region
A paint pigment that absorbs red light and gives off blue light
a.
b.
c.
d.
is fluorescent
is phosphorescent
is used in lasers
is polarized
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Lesson 9
The Interaction of Light with Atoms and Molecules
e.
does not exist
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The Science of Physics
25.
The hottest star is the star that glows __________.
a.
b.
c.
26.
red
yellow
blue
The ratio of the energy of a photon to its frequency is
a.
b.
c.
d.
e.
pi
Planck’s constant
its speed
the photon’s wavelength
none of these
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