Discoveries and inventions of the nineteenth century (1905)
Routledge, Robert · London : G. Routledge and Sons · leaf 453
nsity, and the ordinary one disappears. When the principalsection of the second crystal has been turned into any intermediate posi-tion, such as through 45° and 135°, or any odd multiple of 45°, both imagesare visible and have equal intensities. This experiment shows that thetwo rays which emerge… … Fig. 207. The ray of light is no longer uniform in its properties all round, but appearsto have acquired different sides, as it were, in passing through the rhomb ofIceland spar. This condition is indicated by saying that the ray xspolarized,and the first rhomb of spar is termed the polarizer,…
Inventions
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