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Electromagnetic radiation
[[File:EM Spectrum Properties edit.svg|thumb|right|200px|Spectrum properties of electromagnetic radiation are diagrammed. Credit: .]]
'''Electromagnetic radiation''' comes in many different types, although the differences between them are quantitative rather than qualitative.  This teaching aid lists the different types that are generally recognised.

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'''Exercise:''' Find out why the eV is discouraged in the SI system.  What would be an appropriate SI unit to replace the keV or MeV?  Why are these units more convenient for physicists than the SI ones?

== Relationships ==
By definition, wavelength x frequency = speed.  Since the 
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speed of light c = 2.997458 x 10<sup>8</sup> m/s, we have

:&lambda; &nu; = c

Also, by Planck's law,

:E = h &nu;

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== See also ==
* [[Electromagnetic fields and waves]]

==External links==
[[Category:Physics]]
[[Category:Radiation]]
[[Category:Resources last modified in August 2016]]