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 243
on 220 LIGHT LECT. in that resonator, the oscillations thus set up beginningand increasing in strength as wave after wave arrives.This is represented graphically by the lower curve inFig. 118. This corresponds, in fact, to the way in whichthe sound-waves from a tuning fork, when they fall… … Fig. 119. reflexion of electric waves. At the focus of one of thesemirrors there was placed vertically an oscillator, anarrangement to produce sparks vibrating up-and-down.The waves which resulted were, of course, waves of up-and-down motion—polarised in a vertical plane—whichwere reflected in a…
Light · X-rays
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