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6 Pages
SHW 13
Course: CHEM 1015, Fall 2011School: Virginia Tech
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Word Count: 415
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1 Question of 10 10.0 Points What is the frequency of light emitted by a helium-neon laser with a wavelength of 632.8 nm and a speed of 3 X 10 8 m/s? A. 4.74 X 1014 s-1 B. 4.74 X 105 s-1 C. 1.58 X 10-3 s-1 D. 2.11 X 1015 s-1 E. 1.58 X 1015 s-1 Answer Key: A Question 2 of 10 10.0 Points Which of these characteristics of light is responsible for determining color? A. magneti c compon ent B. electric al...
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1 Question of 10
10.0 Points
What is the frequency of light emitted by a helium-neon laser with a wavelength of 632.8 nm and a speed of 3
X 10 8 m/s?
A.
4.74 X
1014
s-1
B. 4.74
X 105
s-1
C. 1.58
X 10-3
s-1
D. 2.11
X 1015 s-1
E. 1.58
X 1015 s-1
Answer Key: A
Question 2 of 10
10.0 Points
Which of these characteristics of light is responsible for determining color?
A.
magneti
c
compon
ent
B.
electric
al
compon
ent
C.
speed
D.
frequen
cy
E.
wavelen
gth
Answer Key: E
Question 3 of 10
10.0 Points
Which of these orders the spectral regions in order of increasing frequency?
A.
microwaves
<visible<ultr
aviolet<xrays
B.
microwaves
<visible<xrays<ultravi
olet
C.
ultraviolet<x
rays<visible
<microwave
s
D.
ultraviolet<v
isible<xrays<micro
waves
E. xrays<micro
waves<ultra
violet<visibl
e
Answer Key: A
Question 4 of 10
10.0 Points
Which of these scientists is credited with the discovery of radio waves?
A.
Bohr
B.
Hertz
C.
Heise
nberg
D.
Roen
tgen
E.
Einst
ein
Answer Key: B
Question 5 of 10
10.0 Points
The process by which an excited electron returns to its ground state with the emission of energy is know as
A.
photode
composi
tion
B.
electron
ic
relaxati
on
C.
spectros
copy
D.
electron
ic
degradat
ion
E.
microw
ave
radiatio
n
Answer B
Question Key: 6 of 10
10.0 Points
Which of these is not an application of MRI?
A.
detecting
diseased
tissue
B.
mapping
brain
function
C.
imaging
injured
tissue
D.
destroyin
g
cancerous
tumors
E. all of
these are
applicatio
ns
Answer Key: D
Question 7 of 10
10.0 Points
Which of these is not an application of lasers?
A.
compac
t discs
B.
imaging
tissues
C.
superm
arket
scanner
s
D.
surveyi
ng
equipm
ent
E.
aiming
devices
Answer Key: B
Question 8 of 10
10.0 Points
How does LASER light differ from ordinary white light? a. Laser light is hotter than white light., b. Laser
light is in phase., c. Laser light is one color., d. Laser light is red.
A. b
only
B. a
and b
C. b
and c
D. a,
b,
and c
E. b,
c,
and d
Answer Key: C
Question 9 of 10
10.0 Points
Which laser has the unique feature of wavelength tunability?
A. gas
B. dye
C.
photo
n
D.
semic
onduc
tor
E.
solidstate
Answer Key: B
Question 10 of 10
Which of these is not a medical application of lasers?
10.0 Points
A. removal
of skin
cancer
B.
reshaping
of the
cornea
C. surgery
D. removal
of tumors
using fiber
optics
E. all of
these are
applications
Answer Key: E
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