Abstract
Photochemistry has been subjected to the enormous development within the last two centuries. This development has been driven mainly by two key factors: inherent scientific thirst for knowledge and worldwide foodstuff and energy needs. Within the development of photochemistry, mutual conditionality of global needs, progress in theory, improving of existing and birth of qualitatively new experimental techniques can be identified. Photochemistry has found its application in various fields of our life, development and protection of the nature.