REFRACTIVE

refractive. Refractive, a. tending or able to refract

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Re‐fract″ive (r?‐fr?kt″?v), a. [[Cf. F. réfractif. See Refract.]] Serving or having power to refract, or turn from a direct course; pertaining to refraction; as, refractive surfaces; refractive powers. 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.