Text-book of general physics, for the use of colleges and scientific schools (1899)
Hastings, Charles Sheldon · Boston: Ginn & company · leaf 748
e symmetrically placedon the left side of OZ are theoptic axes, for in this directionof propagation only one planewave-front exists. The position of the two re-fracted plane waves resultingfrom an incident plane wavemay be found by the same con-struction as that employed in Fig. 474, namely, by… … Fig. 482. 633. Conical Refraction. — It was pointed out by Sir Wil-liam Hamilton that if the refracted plane wave should havesuch a position, MN (Fig. 482), that it was tangent to bothsheets of the wave surface, this plane would touch the sur-face in a circle, and any line drawn from 0 to this…
Physics
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