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



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