spherical cavity

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• Optical cavity — An optical cavity or optical resonator is an arrangement of mirrors that forms a standing wave cavity resonator for light waves. Optical cavities are a major component of lasers, surrounding the gain medium and providing feedback of the laser… …   Wikipedia

• sound — sound1 soundable, adj. /sownd/, n. 1. the sensation produced by stimulation of the organs of hearing by vibrations transmitted through the air or other medium. 2. mechanical vibrations transmitted through an elastic medium, traveling in air at a… …   Universalium

• Sound — /sownd/, n. The, a strait between SW Sweden and Zealand, connecting the Kattegat and the Baltic. 87 mi. (140 km) long; 3 30 mi. (5 48 km) wide. Swedish and Danish, Oresund. * * * I Mechanical disturbance that propagates as a longitudinal wave… …   Universalium

• Richard Liboff — Richard L. Liboff is a U.S. physicist who has authored five books and nearly 150 other publications in variety of fields, including plasma physics, planetary physics, cosmology, quantum chaos, and quantum billiards.He earned his Ph.D., 1961 from… …   Wikipedia

• Voitenko compressor — In 1965 a Russian scientist proposed that the shaped charge originally developed for piercing thick steel armor be adapted to the task of accelerating shock waves. The resulting device, looking a little like a wind tunnel, is called a Voitenko… …   Wikipedia

• Strömgren sphere — In theoretical astrophysics, a Strömgren sphere is the sphere of ionized hydrogen (H II) around a young star of the spectral classes O or B. Its counterpart in the real word are the H II regions, a type of an emission nebula, the most prominent… …   Wikipedia

• History of Physics —     History of Physics     † Catholic Encyclopedia ► History of Physics     The subject will be treated under the following heads: I. A Glance at Ancient Physics; II. Science and Early Christian Scholars; III. A Glance at Arabian Physics; IV.… …   Catholic encyclopedia

• Nucleon — For the Ford concept car, see Ford Nucleon. For the fictional power source in the Transformers universe, see Nucleon (Transformers). An atomic nucleus is a compact bundle of the two types of nucleons: Protons (red) and neutrons (blue). In this… …   Wikipedia

• vesicle — /ˈvɛsɪkəl / (say vesikuhl) noun 1. a little sac or cyst. 2. Anatomy, Zoology a small bladder like cavity, especially one filled with fluid. 3. Pathology a circumscribed elevation of the epidermis containing serous fluid. 4. Botany a small bladder …  

• vesicle — [ves′i kəl] n. [< Fr or L: Fr vésicule < L vesicula, dim. of vesica, bladder] 1. a small, membranous cavity, sac, or cyst; specif., a) Anat. Med. a small cavity or sac filled with fluid; esp., a small, round elevation of the skin containing …   English World dictionary

• Nuclear fusion — Nuclear physics Radioactive decay Nuclear fission Nuclear fusion Classical dec …   Wikipedia