• Noun

    Physics . the change of direction of a ray of light, sound, heat, or the like, in passing obliquely from one medium into another in which its wave velocity is different.
    Ophthalmology .
    the ability of the eye to refract light that enters it so as to form an image on the retina.
    the determining of the refractive condition of the eye.
    Astronomy .
    Also called astronomical refraction. the amount, in angular measure, by which the altitude of a celestial body is increased by the refraction of its light in the earth's atmosphere, being zero at the zenith and a maximum at the horizon.
    the observed altered location, as seen from the earth, of another planet or the like due to diffraction by the atmosphere.

    tác giả


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