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Electromagnetic Spectrum

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Reilly Kissinger

on 12 May 2010

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Transcript of Electromagnetic Spectrum

The electromagnetic spectrum From radio waves to Gamma waves And everything in between electromagnetic waves can travel through vacuums unlike mechanical waves, which require a medium to travel. The electromagnetic spectrum is a fancy name for different types of radiation radiation is energy emitted in forms of waves
energy that travels and spreads out as it goes. the electromagnetic spectrum can be expressed in terms of energy, wavelength, or frequency. or, electromagnetic waves. so basically, electromagnetic waves are highly superior to mechanical waves. Radio waves The same waves that are emitted by radio stations! (and your tv) also emitted by stars and gases in space size of waves ranges from 100 m to 1 cm
Am waves are larger than Fm waves, which are larger than Tv waves. AM ~ 100m fm~ 1m tv~ between 1m and 1cm microwaves (yes, microwaves!) can communicate with satellites, study the universe and cook popcorn! wavelength of about a cm. very commonly used in radars, to study outer space. infrared waves our skin emits infrared waves. this is why we can be
seen in the dark with
night-vision goggles. in space, Infrared waves map
the dust between stars. wavelength of 0.000001 meters. that is the size of the point of a pin. visible waves! the color we can see. also known as ROY G BIv
red orange yellow green blue indigo violet colors on the red end of the spectrum have a wavelength of close to 700 nm nanometers colors on the purple end, however, have a wavelength of closer to 400 nm we see these waves in color: water vapor can break apart
the wavelengths, and so we have
RAINBOWS. the color of the object that
we see is the color of the light
ultraviolet rays emitted by the sun wavelength of 10^-8 m or 0.000000001 m. just past the violet end of
the visible spectrum but
just a little shorter. stars and other hot objects
in space emit UV rays x-rays (used by your doctor) but are also emitted by
hot gases in the universe
wavelength of ~0.00000000001 m
about the size of an atom gamma-rays can be emitted by radioactive objects natural or man-made large particle accelerators
(make new atoms) sometimes
emit gamma-rays wavelength~0.0000000000001 m nucleus sized but all these waves
really aren't that
different. they are all electromagnetic
radiation. so how does all of this relate? covered in order from largest to smallest
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