Photochemistry Made Easy: Light Absorption Episode #02
Photochemistry is the branch of chemistry concerned with the chemical effects of light. Generally, this term is used to describe a chemical reaction caused by absorption of ultraviolet (wavelength from 100 to 400 nm), visible light (400 – 750 nm) or infrared radiation (750 – 2500 nm).
In nature, photochemistry is of immense importance as it is the basis of photosynthesis, vision, and the formation of vitamin D with sunlight. Photochemical reactions proceed differently than temperature-driven reactions. Photochemical paths access high energy intermediates that cannot be generated thermally, thereby overcoming large activation barriers in a short period of time, and allowing reactions otherwise inaccessible by thermal processes. Photochemistry is also destructive, as illustrated by the photodegradation of plastics.
Credits
Essentials of Physical Chemistry by Arun Bahl & J.D Tuli
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Photochemistry Made Easy: Light Absorption Episode #02
Теги
LIGHT ABSORPTIONintensity of radiationabsorption coefficientLambert LawLambert-Beer Lawdetector.a thermopilechemical actinometerThermocouplesLAWS OF PHOTOCHEMISTRYGrothus-Draper lawStark-Einstein lawPhotochemical Equivalenceprimary reactionsecondary reactionsPhotochemistry Made EasyUranyl oxalate actinometerQuantum efficiencyDecomposition of HlKhaled AcademyKhaled F. Khaledخالد فؤاد خالدAin Shams University
