Double refraction

Definition of Double refraction

(Opt.) See Refraction.
(Opt.) the refraction of light in two directions, which produces two distinct images. The power of double refraction is possessed by all crystals except those of the isometric system. A uniaxial crystal is said to be optically positive (like quartz), or optically negative (like calcite), or to have positive, or negative, double refraction, according as the optic axis is the axis of least or greatest elasticity for light; a biaxial crystal is similarly designated when the same relation holds for the acute bisectrix.

See also: Double Refraction

Related Words

birefringence, refraction
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Double drum
Double eagle
Double elephant paper
Double entry
Double first
Double floor
Double flower
Double fugue
Double geared
Double image micrometer
Double letter
Double note
Double octave
Double pedro
Double pica
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Double quarrel
-Double refraction-
Double refraction micrometer
Double riveting
Double salt
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double standard
Double star
Double sulphide
Double tansy
Double time
Double window
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Double-bank
Double-banked
Double-barreled
Double-beat valve
Double-breasted
Double-charge
double-crosser
double-dealing
Double-decker
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