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English-Thai Dictionary

refractive

A เกี่ยวกับ การหักเห

Webster's 1828 Dictionary

REFRACTIVE

a.That refracts or has power to refract or turn from a direct course; as refractive densities.

Webster's 1913 Dictionary

REFRACTIVE

Re *fract "ive (r *frkt "v ), a. Etym: [Cf. F. réfractif. See Refract. ]

Defn: 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.

REFRACTIVENESS

REFRACTIVENESS Re *fract "ive *ness, n.

Defn: The quality or condition of being refractive.

New American Oxford Dictionary

refractive

re frac tive |riˈfraktiv rəˈfræktɪv | ▶adjective of or involving refraction. DERIVATIVES re frac tive ly adverb, re frac tiv i ty noun

refractive index

re frac tive in dex |rəˈfræktɪv | ▶noun the ratio of the velocity of light in a vacuum to its velocity in a specified medium.

Oxford Dictionary

refractive

re ¦fract |ive |rɪˈfraktɪv | ▶adjective of or involving refraction. DERIVATIVES refractively adverb

refractive index

re ¦fract |ive index ▶noun the ratio of the velocity of light in a vacuum to its velocity in a specified medium.