Six lectures on light : delivered in America in 1872-1878 (1886)
Tyndall, John, 1820-1893 · New York : D. Appleton · leaf 213
reflected light; mark- 182 ON LIGHT. LECT, ing the apex of the cone by a pointer, and cutting offthe light by the iodine solution (T),a momsnts exposureof the pile (P) at the marked point produces a violentdeflection of the needle. The common and total reflection of a beam of radiantheat may be… … It meets the hypothenuse at an obliquity greaterthan the limiting angle, and is therefore totally re-flected. Quenching the light by the ray-filter at F,and placing the pile at P, the totally-reflected heat-beam is immediately felt by the pile, and declared bythe galvanometric deflection. •…
Light
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