Photochemistry: Study the interaction between small molecules and radiation. Measure the absolute photoabsorption and ph一)光化学:研究光与小分子的作用.测量绝对光吸收及光游离的截面积值,验明光化学产物为何,以了解光化学反应的能量走向.应用:燃烧化学及大气化学.