laws of refraction

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• refractionist — A person trained to measure the refraction of the eye and to determine the proper corrective lenses. * * * re·frac·tion·ist shə nəst n a person (as an optometrist) skilled in the practical application of the laws of refraction esp. to the… …   Medical dictionary

• Bacon (Francis) and man’s two-faced kingdom — Francis Bacon and man’s two faced kingdom Antonio Pérez Ramos Two closely related but distinct tenets about Bacon’s philosophy have been all but rejected by contemporary historiography. The first is Bacon’s attachment to the so called British… …   History of philosophy

• extraordinary ray — noun Optics (in double refraction) the light ray that does not obey the ordinary laws of refraction …   English new terms dictionary

• ordinary ray — noun Optics (in double refraction) the light ray that obeys the ordinary laws of refraction …   English new terms dictionary

• extraordinary ray — noun : the part of a ray divided in two by double refraction that does not follow the ordinary laws of refraction because its speed varies with its direction in the doubly refracting medium …   Useful english dictionary

• ordinary ray — noun : the part of a ray divided in two by double refraction that follows the ordinary laws of refraction because its speed is the same in all directions through the doubly refracting medium …   Useful english dictionary