emit+rays
121black hole — Astron. a theoretical massive object, formed at the beginning of the universe or by the gravitational collapse of a star exploding as a supernova, whose gravitational field is so intense that no electromagnetic radiation can escape. * * * Cosmic… …
122Black Hole — 1. Also called Black Hole of Calcutta. a small prison cell in Fort William, Calcutta, in which, in 1756, Indians are said to have imprisoned 146 Europeans, only 23 of whom were alive the following morning. 2. (l.c.) any usually wretched place of… …
123Astronomy — (from the Greek words astron (ἄστρον), star , and nomos (νόμος), law ) is the scientific study of celestial objects (such as stars, planets, comets, and galaxies) and phenomena that originate outside the Earth s atmosphere (such as the cosmic… …
124Getter Robo — ゲッターロボ (Gettā Robo) Genre Action, Mecha Manga Written by Go Nagai, Ken Ishikawa …
125LOFAR — Infobox Telescope bgcolour = name = Low Frequency Array caption = LOFAR prototype antennas; this installation was succeeded by Core Station 1 (CS 1) in 2007 organization = ASTRON location = 3 kilometre!km north of Exloo, the Netherlands (core)… …
126x-ray astronomy — x ray astronomer. the branch of astronomy that studies celestial objects by means of the x rays emitted by them. Cf. x ray (def. 1b). [1960 65] * * * Study of astronomical objects and phenomena that emit radiation at X ray wavelengths. Because… …
127X-ray — [ 22 December 1895 and presented to Professor Ludwig Zehnder of the Physik Institut, University of Freiburg, on 1 January 1896. The dark oval on the third finger is a shadow produced by her ring. [cite book last = Kevles first =Bettyann Holtzmann …
128laser — /lay zeuhr/, n. Physics. a device that produces a nearly parallel, nearly monochromatic, and coherent beam of light by exciting atoms to a higher energy level and causing them to radiate their energy in phase. Also called optical maser. [1955 60; …
