About The Word Prism
Learn about the word Prism to help solve your crossword puzzle. Discover Prism definitions and meaning, origins, synonyms, related terms and more at the free Crossword Dictionary.
Prism
Prism Definition And Meaning |
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What's The Definition Of Prism?
[n] optical device having a triangular shape and made of glass or quartz; used to deviate a beam or invert an image
[n] a polyhedron with two congruent and parallel faces (the bases) and whose lateral faces are parallelograms Synonyms | Synonyms for Prism: optical prism Related Terms | Find terms related to Prism: See Also | biprism | erecting prism | optical device | parallelepiped | parallelepipedon | parallelopiped | parallelopipedon | polyhedron | prism spectroscope | quadrangular prism | scope | spectroscope | telescope | triangular prism Prism In Webster's Dictionary \Prism\ (pr[i^]z'm), n. [L. prisma, Gr. pri`sma, fr.
pri`zein, pri`ein, to saw: cf. F. prisme.]
1. (Geom.) A solid whose bases or ends are any similar,
equal, and parallel plane figures, and whose sides are
parallelograms.
Note: Prisms of different forms are often named from the
figure of their bases; as, a triangular prism, a
quadrangular prism, a rhombic prism, etc.
2. (Opt.) A transparent body, with usually three rectangular
plane faces or sides, and two equal and parallel
triangular ends or bases; -- used in experiments on
refraction, dispersion, etc.
3. (Crystallog.) A form the planes of which are parallel to
the vertical axis. See {Form}, n., 13.
{Achromatic prism} (Opt.), a prism composed usually of two
prisms of different transparent substances which have
unequal dispersive powers, as two different kinds of
glass, especially flint glass and crown glass, the
difference of dispersive power being compensated by giving
them different refracting angles, so that, when placed
together so as to have opposite relative positions, a ray
of light passed through them is refracted or bent into a
new position, but is free from color.
{Nicol's prism}, {Nicol prism}. [So called from Wm. Nicol, of
Edinburgh, who first proposed it.] (Opt.) An instrument
for experiments in polarization, consisting of a rhomb of
Iceland spar, which has been bisected obliquely at a
certain angle, and the two parts again joined with
transparent cement, so that the ordinary image produced by
double refraction is thrown out of the field by total
reflection from the internal cemented surface, and the
extraordinary, or polarized, image alone is transmitted.
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