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 313
s, andthey appear transparent. Theothers are imitation rubiesmade of ruby-coloured glass, and appear quite opaque. You will have noticed that I have spoken of theserays as Rontgen light. But are we really justified incalling it light ? It is invisible to our eyes ; but then soalso is ordinary… … Fig. 156. 1 M. Henri Becquerel (see Comptes Rendics, cxxii. pp. 559, 790,etc.) and I myself (see Philosophical Magazine, July 1896, p. 103)quite independently discovered some invisible radiations that areemitted by uranium salts, and by the metal uranium, which canaffect photographic plates, and…
Light · X-rays
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