Science Fair Project Encyclopedia
Petahertz
A petahertz (symbol PHz) is a measure of frequency equal to a quadrillion hertz or a thousand terahertz.
In the electromagnetic spectrum, the low end of the petahertz range includes ultraviolet light, visible light, and infrared light, while the upper range includes X-rays and gamma rays.
See also SI prefix.
10-26-2009 08:16:03
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The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details


