invisible spectrum


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in·vis·i·ble spec·trum

the radiation lying on either side of visible light, that is, infrared and ultraviolet light.

invisible spectrum

The portion of the spectrum either below the red (infrared) or above the violet (ultraviolet), which is invisible to the eye, the waves being too long or too short to affect the retina. The invisible spectrum includes rays less than 3900 Å in length (ultraviolet, roentgen or x, gamma, and cosmic rays) and those exceeding 7700 Å in length (infrared, high-frequency oscillations used in short- and long-wave diathermy, radio, hertzian, and very long waves). These range in length from 7700 Å to 5,000,000 m.
See also: spectrum
References in periodicals archive ?
From those humble beginnings the federal regulation of the invisible spectrum began with the hope of tying societal objectives with a framework built around an appropriate legal model.
White, bases his "propertyzing" model on analogizing the invisible spectrum with real estate.
The first critique levied by opponents to the personal property model (and its real estate analogy) is that it fundamentally ignores the physical characteristics of the invisible spectrum. (71) What personal property proponents see as the core strength of their argument is really its inherent weakness.