Results for spectrum

Definitions of spectrum:

part of speech: noun

The image of something seen continued after the eyes are closed: the colors of light separated by a prism, and exhibited as spread out on a screen:- pl. SPECTRA.

part of speech: noun

Analysis, the act or art of ascertaining the character and composition of luminous bodies, or of non- luminous bodies when in a state of combustion, by causing a ray of light from the body desired to be so analysed to pass through a prism, each substance in the spectrum having its own characteristic system of lines.

part of speech: noun

An image formed by the dividing of a ray of light into parts arranged according to their different wavelengths, as in the rainbow or in the passing of light through a prism.

Usage examples for spectrum:

• Their wave- lengths are between 5774 and 5390. It is such a distinct absorption spectrum that it is possible to determine with certainty that the fluid actually contains a certain substance, even though the microscope might fail to give sure proof. "The Dream Doctor", Arthur B. Reeve

• You keep your eye on the Spectrum this afternoon and tomorrow morning. "That Fortune", Charles Dudley Warner Last Updated: February 22, 2009

• The instruments showed that the screen was no longer encountering serious loading, and, further, the load was coming in at a frequency harmlessly far down the radio spectrum "Invaders from the Infinite", John Wood Campbell