deep reflector
31Reflection (physics) — Reflection is the change in direction of a wave front at an between two different media so that the wave front returns into the medium from which it originated. Common examples include the reflection of light, sound and water waves. Law of… …
32Lincoln Town Car — Infobox Automobile name=Lincoln Town Car manufacturer=Ford Motor Company production=1981 present predecessor=Lincoln Continental successor= class=Full size luxury car platform=Ford Panther platform layout=FR layoutThe Lincoln Town Car is a full… …
33Observatorio de Calar Alto — Uno de los telescopios del observatorio Organización Instituto de Astrofísica de Andalucía, Instituto Max Planck de Astrofísica. Situación Almería, España …
34Methane clathrate — Burning ice . Methane, released by heating, burns; water drips. Inset: clathrate structure (University of Göttingen, GZG. Abt. Kristallographie). Source: United States Geological Survey. Methane clathrate, also called methane hydrate,… …
35mining — /muy ning/, n. 1. the act, process, or industry of extracting ores, coal, etc., from mines. 2. the laying of explosive mines. [1250 1300; ME: undermining (walls in an attack); see MINE2, ING1] * * * I Excavation of materials from the Earth s… …
36Chinese space program — This article is about the Chinese space program in general. For the current Chinese space agency since 1993, see China National Space Administration. The launch of Tianlian, Xichang Center The space program of the People s Republic of China is… …
37Light-emitting diode — LED redirects here. For other uses, see LED (disambiguation). Light emitting diode Red, pure green and blue LEDs of the 5mm diffused type Type Passive, optoelectronic Working principle Electr …
38Radioactive waste — 2007 ISO radioactivity danger logo, designed in part for long term radioactive waste depositories which might survive into a far future time in which all knowledge of the meaning of present common radiation danger symbols and signs has been lost… …
39Amateur telescope making — The field of amateur telescope making is considered an offshoot of the amateur astronomy community. Amateur telescope makers (sometimes called ATMs), as their name implies, are not paid professionals. They build their telescopes for the enjoyment …
40Color gel — See also: Photographic filter Many color gels organized, some in gel frames A color gel or color filter (UK spelling: colour gel or colour filter), also known as lighting gel or simply gel, is a transparent colored material that is used in… …
