- newtonian aberration
- chromatic a.
Medical dictionary. 2011.
newtonian aberration
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Newtonian telescope — The Newtonian telescope is a type of reflecting telescope invented by the British scientist Sir Isaac Newton (1642–1727), using a concave primary mirror and a flat diagonal secondary mirror. Newton’s first reflecting telescope was completed in… … Wikipedia
Aberration — (1) A deviation or irregularity. For example, a chromosome aberration is a deviation from the normal chromosome number or the normal chromosome structure. In this sense, aberration is also synonymous with deflection, departure, divergence,… … Medical dictionary
Chromatic aberration — On top is corner detail in a photograph taken with a higher quality lens; bottom is a similar photograph taken with a wide angle lens showing severe visible lateral chromatic aberration. The effect is pronounced on the right side of the building… … Wikipedia
Relativistic aberration — is described by Einstein s special theory of relativity, and in other relativistic models such as Newtonian emission theory. It describes aberration of light due to objects moving at relativistic speeds] and is described by the following formula … Wikipedia
chromatic aberration — n aberration caused by differences in the refraction of light at different frequencies * * * unequal deviation of light rays of different wavelengths passing through a refractive medium, resulting in fringes of color around the image produced;… … Medical dictionary
Newton — Sir Isaac, English physicist, 1642–1727. See n., newtonian aberration, Newtonian constant of gravitation, newtonian flow, newtonian viscosity, N. disk, N. law. * * * new·ton n(y)üt ən n the unit of force in the metric system equal to the force… … Medical dictionary
Reflecting telescope — 24 inch convertible Newtonian/Cassegrain reflecting telescope on display at the Franklin Institute. A reflecting telescope (also called a reflector) is an optical telescope which uses a single or combination of curved mirrors that reflect light… … Wikipedia
Luminiferous aether — The luminiferous aether: it was hypothesised that the Earth moves through a medium of aether that carries light In the late 19th century, luminiferous aether or ether, meaning light bearing aether, was the term used to describe a medium for the… … Wikipedia
Speed of gravity — In the context of classical theories of gravitation, the speed of gravity refers to the speed at which a gravitational field propagates. This is the speed at which changes in the distribution of energy and momentum result in noticeable changes in … Wikipedia
Optical 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… … Wikipedia
