Stark Einstein Law Of Photochemical Equivalence Pdf 12

The development of the quantitative aspects of photochemistry began with the enunciation of the quantum theory by Max Planck in 1900. The second law of photochemistry (Stark, 1908 and Einstein, 1912) states that for each photon of light absorbed by a chemical system, only one molecule is activated for its subsequent reaction. This photochemical equivalence law was definitely derived by Einstein during his development of the quantum (photon) theory of light. It should be noted that irradiation of a system by very intensive lasers can caused that one molecule absorbs simultaneously two (in general even more) photons. Such a non-linear optical processes were predicted originally in 1931 (Goeppert-Meyer, 1931), observed thirty years later (Keiser, 1961) and are of practical importance.

stark einstein law of photochemical equivalence pdf 12

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