Theoretically, light consisting of just one wavelength. Since no light is completely monochromatic, it usually consists of a very narrow band of wavelengths. Lasers provide the narrowest bands.

Theoretically, light consisting of just one wavelength. Since no light is completely monochromatic, it usually consists of a very narrow band of wavelengths. Lasers provide the narrowest bands.

A unit of length in the International System of Units (SI) equal to one billionth of a meter (10^-9 meter). Once called a millimicron, it is used to represent wavelength. Abbreviated nm.

A solid-state laser of Neodymium:glass offering high power or short pulses, or both, for specific industrial applications.