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Electromagnetic Spectrum

TEK 8.8C
by

Donald Becker

on 10 December 2013

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Transcript of Electromagnetic Spectrum

Electromagnetic Spectrum:

The full range of frequencies that characterize light
Radio waves have the least energy and
the longest wavelength of all waves in
the electromagnetic spectrum. Radio waves are used for communication.
Microwaves are used in cooking,
navigation, and as weather or police
radar.
Infrared waves create the warmth you feel from the sun. Infrared waves can be used to take photographs showing areas of heat. The remote control for your TV probably uses infrared waves!
The white light you see is the visible spectrum. It is made up of different bands of color, each with a different wavelength.

Light that passes through a prism is bent, or refracted, into these different bands
Red - longest wavelength, less energy than the others
Orange
Yellow
Green
Blue
Indigo
Violet - shortest wavelength, most energy of the colors
Ultraviolet waves can damage your skin.
Ultraviolet waves are also used
to sterilize medical equipment, such as goggles in the science lab.
X-rays can be used to look at your bones and teeth. If you have ever had a broken bone, you had an x-ray taken!
Gamma rays have the most energy and
shortest wavelength of the waves in the
electromagnetic spectrum. Gamma rays
are produced by radioactive elements
and can destroy cells.
The apparent change in the frequency caused by relative motion between the source of the wave and the observer
As the wavelength ___________,
the energy and frequency _____________.
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