Elementary natural philosophy : designed for high schools and academies (1881)
Griffin, La Roy F. (La Roy Freese), 1844-1916 · Philadelphia : Sower, Potts & Co. · leaf 231
fect upon aray of transmitted light. The ray which enters as one isdivided into two distinct rays. One of these, called theOrdinary Ray, obeys the laws of refraction: the other, calledthe Extraordinary Ray, is independent of these laws. POLARIZATION. 221 747. Iceland Spar, or crystallized carbonate… … Fig. 262 748. Optical Axis. Every double refracting crystal hajone line along which the light moves without division.This is called the Optical Axis. 749. Cause of Double Refraction. The explanation ofDouble Refraction is that the light undulations, which areretarded to some extent in all…
Physics
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