Elementary natural philosophy : designed for high schools and academies (1881)
Griffin, La Roy F. (La Roy Freese), 1844-1916 · Philadelphia : Sower, Potts & Co. · leaf 232
n a tube. E is an end viewof the crystal. The layer of balsam totally reflects the Ordinary Rayproduced by Double Refraction, so sending it to the sideof the instrument, while the Extraordinary Ray passes di-rectly through. The balsam does this because its index ofrefraction is between that of the… … LEA£CN TOE POLAKIZATION. 223 754. Reason for Polarization. A ray or light may beconsidered as made by transverse movements of the mole-cules of the medium in all directions, arid its cross sectionwould then be Fig. 265. This by the principle of Compo-
Physics
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