Diagram - Wikispaces stations... · wave velocity frequency reflection wavelength ... set of terms...
Transcript of Diagram - Wikispaces stations... · wave velocity frequency reflection wavelength ... set of terms...
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Terms of Light
Light is a form of energy that originates at the sun. It is a form of energy that is visible to the humaneye. Match each term in the word box to its definition.
visible light spectrum troughhertz wave velocity frequencyreflection wavelength prismrefraction photon light
crest
This refers to the bending of light waves when they pass throughanother substance.
This is the bounce of a light wave off another object.
This is a particle of light.
This term refers to the highest point of a wave.
This is a type of electromagnetic radiation.
This is the distance between corresponding points on two waves.
v’1 f’L(iThis is a continuous band of colors arranged according to wavelength
- or frequency.
This is the lowest point of a light wave.
1( ( S 1Y) This is triangular-shaped glass or other transparent material thatrefracts white light into a spectrum of colors.
e \z’Ck\f.. \J etc Ci
,
This is calculated by multiplying frequency times wavelength.
This is a measurement unit for frequency.
1z U LLU I/ This refers to the number of waves that pass a given point in onesecond.
Mame Date
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6 light and Sound
Diagram of a WaveBoth light and sound travel in waves. Use the terms in the word box to label the parts of a wave.
amplitude wavelength crest equilibrium trough
Match each term in the word box above to its description.
t This is a measure from a point on one wave to the corresponding pointon the next wave.
• 1J’ This is the lowest point on a wave.
0 (1S+ This is the highest point on a wave.
ktk.t This is the distance a wave rises or falls from its equilibrium.
If This describes when the wave is at a rest position.
Name AnSIk3 Date
0
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Lightanci Sound 81
Classify Refraction MaterialsVisible light can pass through some types of matter but not others. Light can pass through somematerials almost unchanged. Other materials scatter light or do not allow it to pass through at all.Use the first set of terms tà label each material’s effect on light. Then classify the second set of terms!nto the correct columns.
light passes through light does not pass through light scatters
aluminum foil plastic wrap cardboardwindow glass stained glass textured glasswax paper plywood construction paperoiled paper velvet vellumclear water silty water mud
prism sheer fabric car windshield
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light and Sound 95
Name
_______________________________________
Date
Light WavesLight is an example of radiant energy. The human eye is only able to see light of a certainwavelength. However, there are other wavelengths that are not visible to the human eye. Use theterms in the word box to label the diagram of the radiant energy spectrum.
C long radio waves X-rays microwaves ultraviolet raysvisible light infrared rays short radio waves gamma rays
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I;88 Lightand Sound
(c)th
em
oon,w
hichtravels
aroundth
eB
arthsix
times
in1
63
.8d
Calculate
thefrequency
of
eachof
thefollow
ingperiods.
/‘(a)
5.O
s(b)
0.8
0s
,.
(c)2.5
x102
s(d)
0.40m
mC
alculatethe
periodof
eachofthe
following
frequencies.(a)
10
Hz
(b)0
.25
Hz
(c)5
00
kH
z(d)
3.5H
zT
hehorizontal
distancebetw
eenthe
endpoints
inthe
swing
ofa
pen
du
lum
is8.0
cm.
What
isthe
amplitude?
The
tine
ofa
tuningfork,
when
struck,has
anam
plitudeof
0.13cm
.If
thefrequency
ofthe
forkis
200H
z,w
hat
totaldistance
will
thetine
travelin
1.00m
m?
16.A
crosssection
ofaw
aveis
shown
below.
Nam
ethe
partsof
the
wave
indicatedby
the
letterson
thediagram
.
(a)B
ym
easuring,findth
ew
avelength-
waves.
(b)If
crestAtakes
2.0s
tom
oveto
where
crestC
isnow
,(i)
what
isthe
speedof
thew
aves?(ii)
wh
atis
thefrequency
ofthew
aves?
//6”7
N\
I.
The
wav
elength
ola
water
wave
is8.0
inand
itsspeed
is2.0
mIs.
110wm
anyw
avesw
illpass
afixed
poin
tin
thc
water
iii1.0
mm
?I).
Exam
inethis
diagramof
aw
aveand
1ist
allpairsof
pointsth
atare
inphase.
‘(b)
determ
ine
thew
avelength,in
centimetres,
bym
easure
ment.
(c)determ
ine
the
speedof
thew
aves,if
theytake
0.50s
totravel
fromX
toY
.W
aterw
avesw
itha
wavelength
of6.0
mapproach
alighthouse
‘at
5.6rn/s.
(a)W
hatis
the
frequencyof
the
waves?
What
isth
eirperiod?
1.
5.0lIz
waves
move
alonga
ropew
itha
wavelength
of40
cm.
What
isth
eirspeed?
-&
The
distancebetw
eensuccessive
crestsin
aseries
ofw
aterw
avesis
5.0rn,and
thecrests
travel8.6
min
5.0s.C
alculatethe
-frequency
ofablock
ofwood
bobbingup
anddow
nin
thew
ater.T
wo
peopleare
fishingfrom
small
boatslocated
30m
apart.W
avespass
thro
ug
hth
ew
ater,and
eachperson’s
boatbobs
upand
down
15tim
esin
1.0m
m.
At
atim
ew
hen
oneboat
ison
acrest,th
eo
ther
oneis
ina
trough,andth
ereis
onecrestbetw
eenthe
two
boats.W
hatis
thespeed
ofthe
waves?
The
wavelength
ofa
water
wave
is3.7
mand
itsperiod
is1.5
s.C
alculate(a)
the
speedof
the
wave.
(b)th
etim
erequired
forth
ew
aveto
travel100
m.
;/
(c)the
distancetravelled
byth
ew
avein
1.00m
m.
2&
Aw
aterw
avetravels
60cm
in2.0
s.If
the
wavelength
is5.0
cm,
wh
atis
thefrequency
ofthe
wave?
Aboat
atanch
or
isrocked
byw
avesw
hosecrests
are30
mapart
and
whose
speedis
8.0rn/s.
What
isthe
intervalof
time
betw
eencrests
strikingth
eboat?
oftlw
27.W
hatis
thespeed
ofa
soundw
avew
itha
wavelength
of3.4
man
da
frequencyof
100H
z?
17.T
hediagram
shows
the
profileofw
avesin
aripple
tank.
directionof
wave
motion
undtuthed
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10.5T
ransmission
and
Reflection
1.T
hew
avelen
gth
ofa
water
wave
ina
rippletan
kis
0.080m
.If th
e
frequen
cyof
the
wave
is2.5
Hz,w
hat
isits
speed?V
=fA(2.5
Hz)(0.080
m)
0.20m
Is
2.T
hedistance
betw
eensuccessive
crestsin
aseries
ofw
aterw
aves
is4.0
m,
andthe
creststravel
9.0m
in4.5
s.W
hat
isth
efre
quen
cyof
thew
aves?M
V=—
9.0m
4.5s
=2.0
mIs
V
—2.0
mIs
—4.0
m=
0.50H
z3.
The
perio
dof
aso
und
wave
froma
pian
ois
1.18x
i0’
s.If
the
speedof
the
wave
inair
is3.4
x102
mIs,
what
isits
wav
elength
?
v=
fA
Therefo
re
Aor
v=
A=
VT
=(3
.4x
102m
/s)(1.1
8x
1W’
s)=
0.40m
Practice
1.A
source
with
afreq
uen
cyof
20H
zproduces
water
waves
thii
hav
ea
wav
elength
of3.0
cm.
What
isth
espeed
ofth
ew
aves?
Aw
avein
arope
travelsat a
speedof
2.5
m/s.
Ifthe
wav
elength
i
.3m
,w
hat
isth
eperio
dof
thew
ave?
3.W
avestravel
along
aw
ireat
aspeed
of10
rn/s.F
indth
efic
quen
cyof
the
sourceif
the
wav
elength
is0.10
iii
4.A
sound
wave
travelsat
350rn/s.
What
isth
ew
avelen
gth
oF‘
sound
with
afreq
uen
cyof
1.4x
10’H
z?5.
Agiven
crestofa
water
wave
requires
5.2s
totravel b
etween
IW
(
poin
tson
afishing
pier
located19
rnapart.
Itis
noted
ina
seit”.
ofw
avesth
at20
crestspass
the
firstpoin
tin
17s.
What
is11w
wav
elength
ofth
ew
aves?6.
An
FM
station
broadcastsradio
signalsw
itha
frequency‘I
92.6M
Hz.
Ifth
eseradio
waves
travelat
aspeed
ol
3.00x
IOin
/s.
what
isth
eirw
avelen
gth
?
Water
waves
and
waves
inlo
ng
springstravel
atlong
asth
em
ediu
mth
eyare
indoes
not
change.tw
olong
springsth
atdiffer
instiffness
arejo
ine
that
the
speedof
aw
avech
anges
abru
ptly
atth
the
two
springs.W
itha
speedch
ange
there
wav
elength
chan
ge.
This
wav
elength
chan
ge
iW
aveE
quation,v
=fA
.S
inceth
efreq
uen
cyconstant
oncethe
wave
isgenerated,
thew
a’spro
portio
nal
toth
espeed,
that
is,Aa
v.W
hen
aw
avetravels
froma
light
ropeinto
ath
esam
eten
sion,
the
wave
slows
dow
nan
decreases.O
nth
eoth
erhan
d,
ifth
ew
avetravels
toa
lightrope,
both
the
speedan
dth
ew
avelen
pro
perties
aretru
eof
allw
aves.A
changein
changesboth
inth
espeed
ofth
ew
aveand
inil
med
ium
where
the
speedis
constan
t,th
erelatio
nth
atAa
1/f.In
oth
erw
ords,if
the
frequencyof
aw
avelengthdecreascs,
afact
easilydem
onstratdifferent
frequen
ciesare
gen
eratedin
arope
orsp
tion
10.2on
page296).
One-d
imen
sional
waves
such
asthose
ina
spr
ina
specialw
ayw
hen
they
arereflected.
Inth
froma
rigidobstacle,
usuallyreferred
toas
fixe
the
pulseis
inverted
.A
crestis
reflectedas
atroL
reflectedas
acrest.
On
theoth
erhan
d,
ifthe
reflefree
end,
where
the
med
ium
isfree
tom
ove,
thei
crestsare
reflectedas
crestsan
dtro
ughs
astrou:
endan
dfree-en
dreflectio
nth
ereis
no
chan
ge
Lw
avelen
gth
.N
oris
there
anych
ange
inthe
speedth
em
ediu
mis
the
same.
fixed
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Using a protractor, determine the angles that I have lettered a — f
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BEHAVIOR OF LIGHT REVIEWRearrange the letters to spell the words that belong in the spaces. Then find the words in the puzzle.
1. Light is a form of ! energy. ARDIAN)2. Light travels in lines. (THIRTAGS)3. An object that lets light pass through it is 1&JVL p(X1fl+ . (SANTERPRANT)4. When light rays are bent, we say they are (r&I)c4d
. (CREAFDERT)5. If an object lets no light pass through it, it is OpO6U
. (EPOQUA)6. A rainbow of colors is called a
______________________________________
. (MECTURPS)7. When light rays bounce back, we say they are
__________________________
. (FLERTDEEC)8. \L OII is the color of the spectrum that is bent the most. (TOIVEL)9. Light we can see is called
__________________________________________
light. (BLIEVIS)10. A dark color (95o (b5 more light than a light color. (BASROBS)
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LIGHT & SOUND . . . I • • .
Copyright © 2000— Mllflken Publishing Co. All rights reserved. MP3426 Ught & Sound