Duff, A. Wilmer (Alexander Wilmer), b. 1864, ed, Guthe, Karl Eugen, 1866-1915, Hallock, William, 1857-1913, Lewis, E. Percival (Exum Percival), 1863-1925, Goodspeed, Arthur W. (Arthur Willis), b. 1860, Carman, Albert Pruden, b. 1861, McClung, Robert Kenning, 1874- · Philadelphia, P. Blakiston's Son & Co · leaf 474
he axis is parallel to the surface, but at right angles to the plane of incidence thewave front is found as shownin Fig. 328. In this case, theextraordinary wave also has acircular section. Only in thisplane of incidence is the ratio(sin /)/(sin r) constant for theextraordinary ray, and thisratio… … Fig. 328.
Physics
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