Transcript Earth`s Energy Supply

Topic: Energy from the sun
• Sun’s energy = __
– __
•__
•__
Electromagnetic Energy –
Parts of a Wave
Frequency = __
Shorter wavelength = _____ = _____
Larger wavelength = _____= _____
All electromagnetic waves…
1)
2)
Travel 300,000,000 m/sec (3x108 m/sec)
Wavelengths have different properties
Where do you think
Take
outfind
your
we can
ESRT, page
information
on 14
the
electromagnetic
spectrum?
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
Infrared camera finds a
prone victim through
thick smoke.
4. Visible Light
We use this wavelength
the most!
• ___
• ___
Violet = shortest
Red = longest
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 5hour sun exposure. Some parts of the skin
are unburned because they were covered
by a bathing suit during the exposure.
Skin Cancer
6. X-Rays
6) X-Rays
•
Short wavelength
 __
•
___
•
___
7) Gamma Rays
7. Gamma Rays
7) Gamma Waves
• ___
• ___
Gamma Ray
burst
How different wavelengths are used in astronomy?
Radio/Microwaves
Infrared
Visible light
Ultraviolet
X -Rays
Final Question
• What type of electromagnetic energy has
the greatest amount of energy and how
can you tell?
• http://www.polleverywhere.com/multiple_c
hoice_polls/LTE1NDg4NTI5NTQ/web