Light visible and invisible : a series of lectures delivered at the Royal Institution of Great Britain, at Christmas, 1896 (1897)
Thompson, Silvanus Phillips, 1851-1916, Royal Institution of Great Britain · New York : Macmillan · leaf 139
!position, the vibrations are not completely extinguished. n; LIGHT LECT. polarised at all. To ascertain that the waves are reallypolarised we must have recourse to an analyser. Thisanalyser, A, is itself simply a smaller polariser. Inorder that you may see it the better it is mounted(see Fig. 75)… … Fig. 74. it, both polariser and analyser being clear as glass. Ifnow the analyser A is turned round one quarter it will,though clear as glass, entirely cut off the up-and-downvibrations, with the result (Fig. 76) that no light getsthrough it. This cutting off of the light by turningthe analyser one…
Light · X-rays
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