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Visible portion is that portion of the [[electromagnetic spectrum]] which is detectable by the human eye. The sun emits "white" light, which is all visible colors, but which is only a small part of the entire electromagnetic spectrum.

Visible portion is that portion of the [[electromagnetic spectrum]] which is detectable by the human eye. The sun emits "white" light, which contains all visible colors, but which is only a small part of the entire electromagnetic spectrum.

Visible light is [[energy]] in the range of approximately 7800 to 3900 Angstroms, where one Angstrom is 0.0000000001 meters. The visible spectrum<ref>http://science.nasa.gov/newhome/help/glossfig1.htm</ref> is most obvious in a rainbow, when the sun's different colors of light are bent (refracted) by the earth's atmosphere during a rainstorm.

Wavelength of visible light is in the range of approximately 3900 to 7800 [[Angstrom]]s, where one Angstrom is 0.0000000001 meters (1×10⁻¹⁰ m). The visible spectrum<ref>http://science.nasa.gov/newhome/help/glossfig1.htm</ref> is most obvious in a rainbow, when the sun's different colors of light are bent (refracted) by the earth's atmosphere during a rainstorm.

== References ==

== References ==

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