optical opacity
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Optical window — Rough plot of Earth s atmospheric transmittance (or opacity) to various wavelengths of electromagnetic radiation, including visible light. The meaning of this term depends on the context: In astronomy, the optical window is the optical portion of … Wikipedia
opacity — The optical density of a material, usually a pigment; the opposite of transparency. A colorant pr paint of high opacity is said to have good hiding power or covering power, by which is meant its ability to conceal another tint or shade over… … Forensic science glossary
Mathematical descriptions of opacity — When an electromagnetic wave travels through a medium in which it gets absorbed (this is called an opaque or attenuating medium), it undergoes exponential decay as described by the Beer–Lambert law. However, there are many possible ways to… … Wikipedia
Electro-optical MASINT — is a subdiscipline of Measurement and Signature Intelligence, (MASINT) and refers to intelligence gathering activities which bring together disparate elements that do not fit within the definitions of Signals Intelligence (SIGINT), Imagery… … Wikipedia
Mass–luminosity relation — In astrophysics, the mass–luminosity relation is an equation giving the relationship between a star s mass and its luminosity. The relationship is represented by the equation: where L⊙ and M⊙ are the luminosity and mass of the sun and… … Wikipedia
Maria Goeppert-Mayer — Born June 28, 1906(1906 06 28) Kattowitz, German Empire … Wikipedia
List of NGC objects (3001–4000) — Image of the spiral galaxy NGC 3244 was taken with the help of the President of the Czech Republic, Václav Klaus, during his visit to ESO s Paranal Observatory[1] This is a list of objects 3001 4000 in the New General Catalogue (NGC). The… … Wikipedia
Список объектов NGC (3001-4000) — Содержание 1 3001 3100 2 3101 3200 3 3201 3300 4 3301 3400 5 3401 3500 … Википедия
surface coating — ▪ chemistry Introduction any mixture of film forming materials plus pigments, solvents, and other additives, which, when applied to a surface and cured or dried, yields a thin film that is functional and often decorative. Surface coatings… … Universalium
star — starless, adj. /stahr/, n., adj., v., starred, starring. n. 1. any of the heavenly bodies, except the moon, appearing as fixed luminous points in the sky at night. 2. Astron. any of the large, self luminous, heavenly bodies, as the sun, Polaris,… … Universalium
