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JeopardyJeopardyJeopardyJeopardyPHY101
Chapter 8 Review
Study of EM Waves
Cheryl Dellai
![Page 2: Jeopardy Jeopardy PHY101 Chapter 8 Review Study of EM Waves Cheryl Dellai](https://reader030.vdocuments.net/reader030/viewer/2022033100/56649ca35503460f94963a27/html5/thumbnails/2.jpg)
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
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Magnetism $100
Like poles (repel/attract).
ANSWER
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ANSWER
Magnetism $200
Magnetic field of the Earth on average.
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ANSWER
Magnetism $300
Magnetic field at Phoenix.
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ANSWER
Magnetism $400
What is the magnetic field force equation?
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Interactions $100
ANSWER
What can change in the magnetic flux?
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ANSWER
What is Faraday's Law?
Interactions $200
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ANSWER
Interactions $300
What is Ampere-Maxwell's Law?
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Interactions$400
ANSWER
What is Lenz’s Law?
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EM Waves $100
ANSWER
How are EM waves created?
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EM Waves $200
ANSWER
A radio transmitter broadcasts at a frequency of 200,000 Hz.
What is the wavelength of the wave?
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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?
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EM Waves$400
ANSWER
About how hot does something have to get to glow red hot?
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EM Spectrum $100
ANSWER
The cosmic background radiation has _____.
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EM Spectrum $200
ANSWER
The main form of radiation that our bodies emit is __________.
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EM Spectrum $300
ANSWER
__________ radiation is emitted from a small hole in a furnace.
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EM Spectrum $400
ANSWER
The total radiant power emitted by a blackbody is proportional to its __________ raised to the fourth power.
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Atmosphere $100
ANSWER
The ionosphere reflects __________ frequency radio waves.
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Atmosphere $200
ANSWER
The ozone layer absorbs __________ radiation from sunlight.
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Atmosphere $300
ANSWER
The greenhouse effect occurs because carbon dioxide in the atmosphere absorbs __________ radiation.
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Atmosphere $400
ANSWER
The increase in the amount of carbon dioxide in the atmosphere is responsible for __________.
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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)
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Potpourri $200
ANSWER
__________ are emitted when high speed electrons decelerate as they are smashed into a metal target.
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Potpourri $300
ANSWER
TV remote controls use __________ radiation.
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Potpourri $400
ANSWER
A superconductor expels any magnetic field from its interior. This is called __________.
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Magnetism$100
Answer
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Like poles (repel/attract).
Repel
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Magnetism$200
Answer
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Magnetic field of the Earth on average
1 gauss or 100 µT
SI unit is Tesla = T
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Magnetism$300
Answer
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Magnetic field at Phoenix.
1/2 gauss or 50 µT
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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
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Interactions$100
Answer
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What can change in the magnetic flux?
The Magnetic FieldThe AreaThe angle
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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.
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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..
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Interactions$400
Answer
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What is Lenz’s Law?
The induced EMF opposes the change that caused it.
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EM Waves $100
Answer
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How are EM waves created?
They are created by accelerating charges.
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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
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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
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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.
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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.
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EM Spectrum $200
Answer
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The main form of radiation that our bodies emit is infrared.
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EM Spectrum $300
Answer
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Blackbody radiation is emitted from a small hole in a furnace.
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EM Spectrum $400
Answer
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The total radiant power emitted by a blackbody is proportional to its temperature raised to the fourth power.
Power = AT4
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Atmosphere $100
Answer
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The ionosphere reflects low (AM) frequency radio waves.
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Atmosphere $200
Answer
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The ozone layer absorbs ultraviolet radiation from sunlight.
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Atmosphere $300
Answer
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The greenhouse effect occurs because carbon dioxide in the atmosphere absorbs infrared radiation.
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Atmosphere $400
Answer
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The increase in the amount of carbon dioxide in the atmosphere is responsible for global warming, the greenhouse effect.
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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)
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Potpourri $200Answer
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X-rays are emitted when high speed electrons decelerate as they are smashed into a metal target.
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Potpourri $300Answer
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TV remote controls use infrared radiation.
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Potpourri $400Answer
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A superconductor expels any magnetic field from its interior. This is called the Meissner effect .
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Thank You for playing Study of EM
Waves Jeopardy!