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ReviewTest - woves Light ond Modern June aOtO
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This test hod?4 creditsof 85 for this sectionof the course(obout28 %). Answer
guestionsondgrodeyourself on lost poge'
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Baseyour arrswersto questions 24 through 26 on the information and diagam below.
A longitudinal wave moves to the right through a uniform medium, as shown below.
points i, B, C,D, and E representthjpositionJ of particlesof the medium.
Wavemovement
t t
t
t
tl
movesto the right?
24 Which diagam best representsthe motion of the particle at position C as the wave
l.
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c
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25 The wavelengthof this wave is equal to the distancebetween points
BandC
4) eandB
BandE
Aandc
a
o
@
26 The enerpy of this wave is related to its
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speed
wavelength
@J period
through flint glassand into
27 A. rayof monochromatic yellow light (/ = 5.0g x l01a Hz) passesfrom water
m"dinm X, as shown below.
Normal
MediumX
The absoluteindex of refraction of medium X is
@ lurr than 1.33
6 geater than 1.33andlessthan 1'52
greater than 1.52 and lessthan 1.66
equal to 1.66
33 What total massmust be converted into enerry
28 A light ray traveling in air enters a second
to l'71 x 108meters
-"din. and its speed'slows
per second. What is the absolute index of
iefraction of the secondmedium?
r.oo
@
(A o.sto
to produce a gamma photon with an energy of
1.03x l0_rsloule?
1.14x l0ro
(! tzs
Sr 3.a3x Wn
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29 Playing a certain musical note on ^a trumpet
causes"thespring on the bottom of a nearby
snare dmm [b vi6rate. This phenomenon is an
exampleof
d) ,"rorr*""
d refraction
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reflecdon
diffracuon
Compared to the massand charge of a proton,
an antiproton has
the samemassand the samecharge
greater massand the samecharge
'fh" r"-" massand the opposite-"h"tgu
greater massand the oppositecharge
Note that question 35 has only three
choices.
30 In a vacuum,all electromagneticwaveshave the
same
frequency
(fi speed
wavelength
35 As viewed from Earth, the light from a star has
lower frequenciesthan the light emitted by the
star becausethe star is
(0 it""
rfl moving toward Earth
@ moing awayfrom Earth
(Jl stationary
3l A particle that is composedof two up quarks and
onedownquarkis a
6 meson
0J neutron
3.09x 10r
8.75x 102e
proton
positron
32 A helium atom consists of trvo protons, two
electrons,and two neutrons.In the helium atom,
the strong force is a fundamental interaction
benareen
tie
Q electrons,only
() electronsand protons
O neutronsand ilectrons
neutronsandprotons
6
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48 The diagram below representsa periodic wave traveling through a uniform medium.
F_6.0
m___l
If the frequency of the wave is 2.0 hertz, the speedof the waveis
g
(fi a.o"ttt
@ 2.0n/s
8.0m/s
4.0 n/s
49 The diagrambelowrepresentsa light ray reflectingfrom a planemirror.
Planemirror
The angleof reflection for the light ray is
Q zs"
eJ 35"
8:s;
50 The &agram below showsa standingwave in a string clamped at each end.
What is the total number of nodesand antinodesin the standingwaveP
3 nodesand 2 antinodes
@ 5 nodesand4 antinodes
2 nodes and 3 antinodes
@ +nodes and 5 antinodes
Baseyour answersto questions 69 through 71 on
the information and diagrambelow.
Baseyour answersto questions72 through 75 on
the information below.
A monochromaticlig\t tay(f --5.09i I}L4HZ)
traveling in air is incident on the surface of a
rectangilar block of LrPite'
As a mercury atom absorbsa photon of
enerry, an electron in the atom changesfrom
energy level d to enerry level e.
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Nonmal
72 Determine the energy of the absorbedphoton in
electronvolts. It]
Light
ray
73 Express the energlr of the absorbed photon in
joules. [t]
Air
Lucite
74 Calculatethe frequency of the absorbedphoton.
[Show all work, including the equation and
substitutionwith units.l lzl
75 Basedon your calculatedvalue of the frequency
of the absorbed photon, determine its
classi{icationin the electromagnetic spectrum.
Air
Measure the angle of incidence for the light ray
to the nearestdegree. [t]
;r:
Calculatethe angle of refraction of the light ray
when it enters the Lucite block. lShow all work,
including the equation and substitution with
units.l [z]
7T What is the angle of refraction of tlie light ray as
it emergesfrom the Lucite block back into air?
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