Angstrom		An Angstrom (abbreviated Å) is one ten-billionth (1/10,000,000,000) of a meter. A hydrogen atom measures about 1 Å across.
		A unit of length equal to 10E-8 centimeters (one one-hundred-millionth of a centimeter). The wavelengths of varous types of light are often given in Angstroms. Optical light (the kind of light our eyes can detect) has wavelengths anywhere from about 4500 Angstroms to 7000 Angstroms.
5200 Angstroms		The representative wavelength of GREEN Light. Limits: 4912 to 5750 angstroms.

Light is a type of electromagnetic radiation preceived at a wave fluctuation. A wave is characterized by two numbers: Wavelength (lambda) = distance between two wave crests Frequency (f) = number of wave crests which pass every second The speed with which a wave travels (c) is equal to its wavelength times its frequency (c = lambda times f). The speed of light is always 300,000 kilometers per second. RADIATION TYPE WAVELENGTH ________________________ ____________________ Cosmic < .00005 Å Gamma .00005 - 1.4 Å X-Rays 0.1 - 100 Å Ultra Violet < 4000 Å Visible 4000 - 7000 Å Violet 4000 - 4240 Å Blue 4240 - 4912 Å Green 4912 - 5750 Å Yellow 5750 - 5850 Å Orange 5850 - 6470 Å Red 6470 - 7000 Å Infra Red > 7000 Å Hertzian >2,200,000 Å