Refractive

Re*fract"ive

(r?*fr?kt"?v), a. [Cf. F. rfractif. See Refract.] Serving or having power to refract, or turn from a direct course; pertaining to refraction; as, refractive surfaces; refractive powers.
[1913 Webster]

Refractive index. (Opt.) See Index of refraction, under Index. -- Absolute refractive index (Opt.), the index of refraction of a substances when the ray passes into it from a vacuum. -- Relative refractive index (of two media) (Opt.), the ratio of the sine of the angle of incidence to the sine of the angle of refraction for a ray passing out of one of the media into the other.
[1913 Webster]

 

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Thu 13th December 2018