EM Worksheet and Review for Test.notebookimages.pcmac.org/SiSFiles/Schools/AL... · EM Worksheet...
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EM Worksheet and Review for Test.notebook 1 September 22, 2014
Transcript of EM Worksheet and Review for Test.notebookimages.pcmac.org/SiSFiles/Schools/AL... · EM Worksheet...
EM Worksheet and Review for Test.notebook
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September 22, 2014
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Vibrating electric and
magnetic fields moving through space at speed of light
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VACUUM
Empty Space
Suns energy
gets to Earth
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RADIATION
Wavelength
Distance between
wave crests
METER
Frequency
The Number
of waves per
second
Hertz
Electromagnetic
Radio
Waves
Micro
Waves
Infrared
Rays
Visible
LightUltraViolet
RaysXRays Gamma
Rays
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LONG
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Vibrating electric and
magnetic fields moving through
space at speed of light, or through medium at slower speed.
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What kind of wave is an electromagnetic wave?
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All are transverse
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If you are watching tv what kind of wave is this?
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Radio
Transverse (All EM waves are these)
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How can we hear what astronauts are saying in space?
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Radio waves; They do NOT need a medium...they can travel through a vacuum
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Which type of EM wave has the lowest frequency? Highest?
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Radio (Rabbits) lowest frequency and wavelength
Gamma (Gardens) highest frequency and wavelength
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Be prepared to give examples of each type of EM wave
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Why can we see a rainbow?
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sunlight can be separated into all the colors of the rainbow.
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What determines the color of a light wave?
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Wavelength and Frequency
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What makes a red ball red?
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Red is reflected all others are absorbed
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What makes us see a black dog?
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All the colors of light are absorbed
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Are colors of the EM spectrum determined by
amplitude or frequency?
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Frequency or wavelength
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What happens if I shine a red and blue light on a red sheet of construction paper?
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Red will be reflected ; blue will be absorbed.
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If your sunglasses only let through the Longest wavelengths of color, what color will you see?
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Red
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How does mixing primary colors and light colors differ?
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If you mix primary colors together you get black. If you mix the colors of light together you get white.
