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JeopardyJeopardyJeopardyJeopardyPHY101
Chapter 8 Review
Study of EM Waves
Cheryl Dellai
Study of EM Waves
Magnetism
InteractionsEM
Waves
EM Spectru
m
Atmosphere Potpourri
$100 $100 $100 $100 $100 $100
$200 $200 $200 $200 $200 $200
$300 $300 $300 $300 $300 $300
$400 $400 $400 $400 $400 $400
Magnetism $100
Like poles (repel/attract).
ANSWER
ANSWER
Magnetism $200
Magnetic field of the Earth on average.
ANSWER
Magnetism $300
Magnetic field at Phoenix.
ANSWER
Magnetism $400
What is the magnetic field force equation?
Interactions $100
ANSWER
What can change in the magnetic flux?
ANSWER
What is Faraday's Law?
Interactions $200
ANSWER
Interactions $300
What is Ampere-Maxwell's Law?
Interactions$400
ANSWER
What is Lenz’s Law?
EM Waves $100
ANSWER
How are EM waves created?
EM Waves $200
ANSWER
A radio transmitter broadcasts at a frequency of 200,000 Hz.
What is the wavelength of the wave?
EM Waves $300
ANSWER
What is the wavelength of the peak of the blackbody radiation curve for something at 3,000 K—the temperature of the filament of a light bulb?
What type of EM wave is this?
EM Waves$400
ANSWER
About how hot does something have to get to glow red hot?
EM Spectrum $100
ANSWER
The cosmic background radiation has _____.
EM Spectrum $200
ANSWER
The main form of radiation that our bodies emit is __________.
EM Spectrum $300
ANSWER
__________ radiation is emitted from a small hole in a furnace.
EM Spectrum $400
ANSWER
The total radiant power emitted by a blackbody is proportional to its __________ raised to the fourth power.
Atmosphere $100
ANSWER
The ionosphere reflects __________ frequency radio waves.
Atmosphere $200
ANSWER
The ozone layer absorbs __________ radiation from sunlight.
Atmosphere $300
ANSWER
The greenhouse effect occurs because carbon dioxide in the atmosphere absorbs __________ radiation.
Atmosphere $400
ANSWER
The increase in the amount of carbon dioxide in the atmosphere is responsible for __________.
Potpourri $100
ANSWER
Bones show up in x ray images because they absorb x rays more efficiently than muscle and other tissues do. (True/False)
Potpourri $200
ANSWER
__________ are emitted when high speed electrons decelerate as they are smashed into a metal target.
Potpourri $300
ANSWER
TV remote controls use __________ radiation.
Potpourri $400
ANSWER
A superconductor expels any magnetic field from its interior. This is called __________.
Magnetism$100
Answer
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Like poles (repel/attract).
Repel
Magnetism$200
Answer
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Magnetic field of the Earth on average
1 gauss or 100 µT
SI unit is Tesla = T
Magnetism$300
Answer
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Magnetic field at Phoenix.
1/2 gauss or 50 µT
Magnetism$400
Answer
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What is the magnetic field force equation?F =qvB = ILB
Where v & B are perpendicular
XXXXXXXX
XXXXXXXX
XXXXXXXX
Interactions$100
Answer
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What can change in the magnetic flux?
The Magnetic FieldThe AreaThe angle
Interactions$200
Answer
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What is Faraday's Law?A changing Magnetic Flux will create a changing Electric Field that opposes the change.
Interactions$300
Answer
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What is Ampere-Maxwell's Law?A changing Electric Flux will create a changing Magnetic Field that opposes the change.
A current will create a Magnetic Field..
Interactions$400
Answer
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What is Lenz’s Law?
The induced EMF opposes the change that caused it.
EM Waves $100
Answer
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How are EM waves created?
They are created by accelerating charges.
EM Waves $200
Answer
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A radio transmitter broadcasts at a frequency of 200,000 Hz.
What is the wavelength of the wave?
=c/f = 1,500 m
EM Waves $300
Answer
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What is the wavelength of the peak of the blackbody radiation curve for something at 3,000 K—the temperature of the filament of a light bulb? What type of EM wave is this?¬max in meters = 0.0029/T in K)
9.67*E10-7 m = 967 nm, infrared
EM Waves $400
Answer
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About how hot does something have to get to glow red hot?T = 0.0029/¬ = 4265K = 3992OC = 7153 OF Red = 680 nm PEAK AT RED
Objects cooler than 700K (800OF) appear red because we can not see into the infrared.
EM Spectrum $100
Answer
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The cosmic background radiation has _.has a blackbody spectrum
.has its peak emission in the microwave band.
corresponds to a blackbody at a temperature of 2.726 Ks.
EM Spectrum $200
Answer
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The main form of radiation that our bodies emit is infrared.
EM Spectrum $300
Answer
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Blackbody radiation is emitted from a small hole in a furnace.
EM Spectrum $400
Answer
Back to Jeopardy
The total radiant power emitted by a blackbody is proportional to its temperature raised to the fourth power.
Power = AT4
Atmosphere $100
Answer
Back to Jeopardy
The ionosphere reflects low (AM) frequency radio waves.
Atmosphere $200
Answer
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The ozone layer absorbs ultraviolet radiation from sunlight.
Atmosphere $300
Answer
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The greenhouse effect occurs because carbon dioxide in the atmosphere absorbs infrared radiation.
Atmosphere $400
Answer
Back to Jeopardy
The increase in the amount of carbon dioxide in the atmosphere is responsible for global warming, the greenhouse effect.
Potpourri $100Answer
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Bones show up in x ray images because they absorb x rays more efficiently than muscle and other tissues do. (True)
Potpourri $200Answer
Back to Jeopardy
X-rays are emitted when high speed electrons decelerate as they are smashed into a metal target.
Potpourri $300Answer
Back to Jeopardy
TV remote controls use infrared radiation.
Potpourri $400Answer
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A superconductor expels any magnetic field from its interior. This is called the Meissner effect .
Thank You for playing Study of EM
Waves Jeopardy!
