• Sun’s energy = __– __
Topic: Energy from the sun
Electromagnetic Energy – •__
•__
Parts of a Wave
Frequency = __
Shorter wavelength = _____ = _____
Larger wavelength = _____= _____
All electromagnetic waves…1) Travel 300,000,000 m/sec (3x108
m/sec)2) Wavelengths have different properties
Where do you think we can find
information on the electromagnetic
spectrum?
Take out yourESRT, page 14
ESRT pg 14
1. Radio Waves
1) Radio Waves
• ___• ___
2) Microwaves
2) Microwaves
• ___• ___
3) Infrared Waves
3) Infrared
• ___• ___
Infrared image of two burritos
IR image of 2 burritos
4. Visible Light4. Visible Light
We use this wavelength the most!
• ___• ___
Red = longest
Violet = shortest
5. Ultraviolet
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
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
6. X-Rays6. X-Rays
6) X-Rays• Short
wavelength __
• ___
• ___
7) Gamma Rays
7. Gamma Rays7. Gamma Rays
7) Gamma Waves7) Gamma Waves• ___• ___
Gamma Ray burst
How different wavelengths are used in How different wavelengths are used in astronomy?astronomy?
Radio/Microwaves Infrared
Visible light
X -RaysUltraviolet
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