A GENERAL REFERENCE MATERIAL
CONCERNING NUMBERS
One encounters an extreme range of numbers in the fiber optics business. For example, a high-speed data link may respond in the picosecond range while a low-speed RS-232 1ink may respond in the millisecond range. To understand fiber optics and much of electronics, one must be familiar with the prefixes used to express these numbers. For example, deep red light at one end of the visible spectrum has a wavelength of 700 nanometers (nm) which is 700 billionths of a meter or 0.00002756 inches. Deep violet visible light has a wavelength roughly half of red's: 350 nm or 0.00001378 inches. Wavelengths of light are given in small numbers. If, however, we express light as a frequency, we get a large number. ...
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