the branch of chemistry concerned with the chemical effects of light; also known as actinology

a harmful type of smog formed when pollutants like vehicle exhaust or industrial gases react with ultraviolet light from the sun

Chemical reaction caused by the absorption of visible or ultraviolet light, including processes like [[光合作用|光合作用|guang1 he2 zuo4 yong4]] and [[光解作用|光解作用|guang1 jie3 zuo4 yong4]]; also called [[光化学反应|光化學反應|guang1 hua4 xue2 fan3 ying4]]

chemical reaction initiated by the absorption of energy in the form of light

(medicine) actinic keratosis; also known as solar keratosis