sun’s energy = __ –__ topic: energy from the sun
TRANSCRIPT
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• Sun’s energy = __– __
Topic: Energy from the sun
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Electromagnetic Energy – •__
•__
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Parts of a Wave
Frequency = __
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Shorter wavelength = _____ = _____
Larger wavelength = _____= _____
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All electromagnetic waves…1) Travel 300,000,000 m/sec (3x108
m/sec)2) Wavelengths have different properties
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Where do you think we can find
information on the electromagnetic
spectrum?
Take out yourESRT, page 14
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ESRT pg 14
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1. Radio Waves
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1) Radio Waves
• ___• ___
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2) Microwaves
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2) Microwaves
• ___• ___
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3) Infrared Waves
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3) Infrared
• ___• ___
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Infrared image of two burritos
IR image of 2 burritos
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4. Visible Light4. Visible Light
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We use this wavelength the most!
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• ___• ___
Red = longest
Violet = shortest
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5. Ultraviolet
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5) Ultraviolet• Used to sterilize, as bacteria can be
killed by UV.
Picture from Matsutek Enterprises Co., Ltd.
Picture from the College of Dental Science and Hospital
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5) Ultraviolet• Causes skin to
tan
A sunburn, photographed 2 days after a 5-hour sun exposure. Some parts of the skin are unburned because they were covered by a bathing suit during the exposure.
Skin Cancer
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6. X-Rays6. X-Rays
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6) X-Rays• Short
wavelength __
• ___
• ___
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7) Gamma Rays
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7. Gamma Rays7. Gamma Rays
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7) Gamma Waves7) Gamma Waves• ___• ___
Gamma Ray burst
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How different wavelengths are used in How different wavelengths are used in astronomy?astronomy?
Radio/Microwaves Infrared
Visible light
X -RaysUltraviolet
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Final Question
• What type of electromagnetic energy has the greatest amount of energy and how can you tell?
• http://www.polleverywhere.com/multiple_choice_polls/LTE1NDg4NTI5NTQ/web