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This text provides a thorough overview of the principles and uses of synthetic organic photochemistry. Photochemistry deals with the process by which a photochemical reaction is carried out is called photolysis. Photolysis is usually initiated by infrared, visible, or ultraviolet light. A primary photochemical reaction is the immediate consequence of the absorption of light. Subsequent chemical changes are called secondary processes. Photochemical reactions are utilized in synthetic chemistry to produce various organic molecules. In addition, many common processes are photochemical in nature and have important applications. For example: Photosynthesis involves the absorption of light by the chlorophyll in plants to produce carbohydrates from carbon dioxide and water. Photography uses the action of light on grains of silver chloride or silver bromide to produce an image. The photo chemical etching process requires infallible digital design skills, keen attention to detail and a remarkable level of knowledge and experience in the principles of both photography and chemistry – or more accurately, photochemistry
