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Po°lariza"tion
(), n.[Cf. F. polarisation.]
1. The act of polarizing; the state of being polarized, or of having polarity.
2. (Opt.) A peculiar affection or condition of the rays of light or heat, in consequence of which they exhibit different properties in different directions.
If a beam of light, which has been reflected from a plate of unsilvered glass at an angle of about 56, be received upon a second plate of glass similar to the former, and at the same angle of incidence, the light will be readily reflected when the two planes of incidence are parallel to each other, but will not be reflected when the two planes of incidence are perpendicular to each other. The light has, therefore, acquired new properties by reflection from the first plate of glass, and is called polarized light, while the modification which the light has experienced by this reflection is called polarization. The plane in which the beam of light is reflected from the first mirror is called the plane of polarization. T
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