|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
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.
|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:
= distance between two wave crests
= 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.