High Quality Content by WIKIPEDIA articles! Phosphorescence is a specific type of photoluminescence related to fluorescence Unlike fluorescence, a phosphorescent material does not immediately re-emit the radiation it absorbs The slower time scales of the re-emission are associated with "forbidden" energy state transitions одныа in quantum mechanics As these transitions occur less often in certain materials, absorbed radiation may be re-emitted at a lower intensity for up to several hours.  Книга шокирующих2010 г Мягкая обложка, 96 стр ISBN 6130486138.