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Scientists use the length of the wave (the distance between peaks) to define the energy of the radiation. Astronomers measure this length in "angstroms," a unit of measure equal to 1 hundred-millionth
An angstrom (symbol ''Å'') is a unit of [[length]] equivalent to one hundred-millionth of a centimeter (1×10<sup>−10</sup> m). Unit is named after Swedish physicist Anders Jonas Ångström.
An angstrom (symbol ''Å'') is a unit of [[length]] equivalent to one hundred-millionth of a centimeter (1×10<sup>−10</sup> m). Unit is named after Swedish physicist Anders Jonas Ångström.
Electromagnetic radiation travels in waves. Scientists use the length of the wave (the distance between peaks) to define the energy of the radiation. Astronomers measure this length in "angstroms," a unit of measure equal to 1 hundred-millionth of a centimeter. It's a convenient shorthand to avoid writing lots of zeroes when talking about the wavelengths of light. In everyday terms, a sheet of paper is approximately 1,000,000 angstroms thick. Visible light covers the range from 4,000 to 8,000 angstroms. [http://liftoff.msfc.nasa.gov/academy/universe/angstrom.html]
==External links==
*[http://liftoff.msfc.nasa.gov/academy/universe/angstrom.html What Is an Angstrom?] - NASA
[[Category:Unit of measure]]
[[Category:Unit of measure]]