visible light rays
21Catoptric light — Catoptric Ca*top tric, Catoptrical Ca*top tric*al, a. [Gr. ?. See {Catopter}.] Of or pertaining to catoptrics; produced by reflection. [1913 Webster] {Catoptric light}, a light in which the rays are concentrated by reflectors into a beam visible… …
22eye disease — Introduction any of the diseases or disorders that affect the human eye (eye, human). This article briefly describes the more common diseases of the eye and its associated structures, the methods used in examination and diagnosis, and the… …
23Wood's glass — was developed by Robert Williams Wood (1868 ndash;1955) as a light filter used in communications during World War I. His invisible radiation technique worked both in infrared daylight communication and ultraviolet night communications. His glass… …
24radiation — 1. Transfer of heat through electromagnetic waves from hot to cold. 2. Electromagnetic waves of energy having frequency and wavelength. The shorter wavelengths (higher frequency) are more energetic. The electromagnetic spectrum is comprised …
25television — noun Usage: often attributive Etymology: French télévision, from télé tele + vision vision Date: 1907 1. an electronic system of transmitting transient images of fixed or moving objects together with sound over a wire or through space by… …
26Compton scattering — Light–matter interaction Low energy phenomena …
27Radiant energy — Visible light (a form of radiant energy) scattered by fog in a forest. Radiant energy is the energy of electromagnetic waves.[1] The quantity of radiant energy may be calculated by integrating radiant flux (or power) with respect to time and …
28electromagnetic radiation — Physics. radiation consisting of electromagnetic waves, including radio waves, infrared, visible light, ultraviolet, x rays, and gamma rays. [1950 55] * * * Energy propagated through free space or through a material medium in the form of… …
29radiation — radiational, adj. /ray dee ay sheuhn/, n. 1. Physics. a. the process in which energy is emitted as particles or waves. b. the complete process in which energy is emitted by one body, transmitted through an intervening medium or space, and… …
30spectroscopy — spectroscopist /spek tros keuh pist/, n. /spek tros keuh pee, spek treuh skoh pee/, n. the science that deals with the use of the spectroscope and with spectrum analysis. [1865 70; SPECTRO + SCOPY] * * * Branch of analysis devoted to identifying… …
