Transcript Electromagnetic Spectrum

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The electromagnetic spectrum consists of 7
different types of light waves.
-Radio Waves
-Microwaves
-Infrared
-Visible Light
-Ultraviolet
-X Rays
-Gamma Rays
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The longest wavelengths
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Lowest frequency
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Lowest energy
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Carries signals to radios and televisions
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AM: Amplitude Modulation (Longest Wavelength)
Bounces off Ionosphere
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FM: Frequency Modulation
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Higher frequency than radio waves.
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Higher energy than radio waves.
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Smaller wavelength than radio waves
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Used for radars, cell phones
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Used to heat up food.
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Has energy that is just below visible light.
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“Infra” means below
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Given off by stars, lamps, fire, etc.
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You can feel infrared radiation as warmth on your
skin.
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Used for remote controls.
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The only part of the EM spectrum that we can see.
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Contains seven different colors.
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Red
Orange
Yellow
Green
Blue
Indigo
Violet
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Found after violet in visible light.
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Effective in killing bacteria and viruses
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Found after violet in visible light.
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Overexposure can cause skin cancer and sunburn.
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Can kill plants if they are overexposed also.
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Sunblock protects your skin from harmful UV rays.
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Used in hospitals to find complications in bones.
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Soft body tissue is transparent to the waves.
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Bones block the rays.
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Overexposure to x-rays can cause cancer.
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Can also cause the reduction of blood.
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Used to treat certain cancers and tumors.
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Could also cause cancers as a disadvantage.
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Detects brain and cardiovascular abnormalities.
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Used to kill pesticides and bugs.
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http://imagine.gsfc.nasa.gov/docs/science/know_
l1/emspectrum.html

http://science.hq.nasa.gov/kids/imagers/teachersi
te/UL3waves.htm
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http://www.darvill.clara.net/emag/emaginfra.htm

http://www.stmary.ws/highschool/physics/uv_1.ht
m