| 释义 |
refractivity
 refractionrefraction of lighti: angle of incidencer: angle of refractionre·frac·tion R0118400 (rĭ-frăk′shən)n.1. The deflection of a wave, such as a light or sound wave, when it passes obliquely from one medium into another having a different index of refraction.2. Astronomy The apparent change in position of a celestial object caused by the bending of light rays as they enter Earth's atmosphere.3. Medicine a. The ability of the eye to bend light so that an image is focused on the retina.b. Determination of this ability in an eye.
re·frac′tion·al, re·frac′tive adj.re·frac′tive·ly adv.re·frac′tive·ness, re′frac·tiv′i·ty (rē′frăk-tĭv′ĭ-tē) n.Thesaurus| Noun | 1. | refractivity - the physical property of a medium as determined by its index of refractionrefractivenessbending, deflexion, deflection - the property of being bent or deflected |
Translations
refractivity
refractivity[‚rē‚frak′tiv·əd·ē] (electromagnetism) Some quantitative measure of refraction, usually a measure of the index of refraction. The index of refraction minus 1. refractivity
re·frac·tiv·i·ty (rē'frak-tiv'i-tē), Refractive power. Synonym(s): refringencyre·frac·tiv·i·ty (rē'frak-tiv'i-tē) Refractive power. refractivity (rē″frăk-tĭv′ĭ-tē) The quality of being refractive; the ability to refract.dispersionPhenomenon of the change in velocity of propagation of radiation in a medium, as a function of its frequency, which causes a separation of the monochromatic components of a complex radiation. All optical media cause dispersion by virtue of their variation of refractive index with wavelengths. Dispersion is specified by the difference in the refractive index of the medium for two wavelengths. The difference between the blue F (486.1 nm) and the red C (656.3 nm) spectral lines is called the mean dispersion, i.e. nF − nC. Dispersion is usually represented by its dispersive power ω or relative dispersion which is equal to the mean dispersion divided by the excess refractive index of the helium d (587.6 nm) spectral line (nd − 1), often called the refractivity of the material,ω = nF − nC/nd − 1The reciprocal of the dispersive power is called the Abbé's number or constringence (Fig. D8). See aberration longitudinal chromatic; achromatic axis; Fraunhoffer's lines; achromatic prism. " > Fig. D8 Dispersion of a white beam of light by a prismFinancialSeeDispersionAcronymsSeeNrefractivity
Synonyms for refractivitynoun the physical property of a medium as determined by its index of refractionSynonymsRelated Words- bending
- deflexion
- deflection
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