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Senior High School: 11th and 12th Grade
Physics
Energy - Infrared Radiation
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Q.1
Why is infrared radiation good for investigating areas of space where large gas clouds have formed?
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It is no better than other types of electromagnetic waves
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It has a longer wavelength than visible light which allows it to pass through these clouds
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It has a shorter wavelength than other types of radiation which allows it to pass through these clouds
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Infrared radiation is absorbed by gas clouds so we cannot detect infrared waves originating from behind the clouds
Q.2
How fast does infrared radiation travel at?
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330 m/s
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3x108 m/s
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Different types travel at different speeds
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30 mph
Q.3
What kinds of bodies emit infrared radiation?
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All bodies above absolute zero
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Cold bodies
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All bodies
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No bodies
Q.4
What is the wavelength band of infrared waves?
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750 nm - 1 mm
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1 mm - 100,000 km
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10 nm - 390 nm
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Less than 0.01 nm
Q.5
Why do dark objects get hot in direct sunlight even though a lot of the sun's infrared radiation does not get through the atmosphere?
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Dark objects are good at absorbing all types of electromagnetic waves and will re-emit them as infrared radiation
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Dark objects do not get hot in direct sunlight
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They gradually absorb the sun's IR and eventually get hot
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They are predominately heated by the Earth and this effect is mistaken for being heated by UV rays
Q.6
Does infrared radiation have a longer or shorter wavelength than visible light?
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Longer
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Shorter
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They are the same
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The wavelength of infrared radiation changes and can be both longer and shorter dependent upon certain factors
Q.7
When was infrared radiation discovered?
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2000
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1066
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1945
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1800
Q.8
Which of the following emits the most infrared radiation?
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The Sun
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An apple
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A pear
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A human being
Q.9
What is infrared radiation?
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It's the transfer of energy by electromagnetic waves
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The radiation given off by radioactive particles
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Infrared radiation is a type of gas
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It is the reaction that occurs by freezing water
Q.10
How can we sense infrared radiation, even though we cannot see it?
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Taste it
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Smell it
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Feel it
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Hear it
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