light-sensitive element
51Photopolymer — A photopolymer is a polymer that cures, or becomes solid, when exposed to light, often in the ultraviolet spectrum. These polymers are useful in dentistry for fillings and in rapid prototyping in the stereolithography and 3D printing processes.… …
52laser — /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; …
53Optical telescope — Eight Inch refracting telescope (Chabot Space and Science Center) An optical telescope is a telescope which is used to gather and focus light mainly from the visible part of the electromagnetic spectrum for directly viewing a magnified image for… …
54Elements of graphical user interfaces — Graphical user interfaces, also known as GUIs, make it easier for people with little computer skills to work with and use computer software. It is a visual front to a piece of software that links the user to the internal workings of a computer,… …
55Metals conservation — The bronze apoxyomenos, ,dated between 1st and 2nd century BC,found and recovered from Adriatic sea near small island Vele Oryule,near island Loshiny, example of archaeological metals conservation, Croatia Metals conservation, or more precisely… …
56Interactive whiteboard — at CeBIT 2007 …
57solar cell — a photovoltaic cell that converts sunlight directly into electricity. * * * Any device that directly converts the energy in light into electrical energy through the process of photovoltaics (see photovoltaic effect). Solar cells do not use… …
58Period (gene) — period serina Identifiers Organism D. melanogaster Symbol per Entrez …
59silicon — A very abundant nonmetallic element, atomic no. 14, atomic wt. 28.0855, occurring in nature as silica and silicates; in pure form, used as a semiconductor and in solar batteries; also found in certain polysaccharide structures in mammary tissue.… …
60base — base1 /bays/, n., adj., v., based, basing. n. 1. the bottom support of anything; that on which a thing stands or rests: a metal base for the table. 2. a fundamental principle or groundwork; foundation; basis: the base of needed reforms. 3. the… …
