Spin-orbit coupling is a kind of relativistic effects, which are basic matter foratom and molecular physics. There is significant important in computing spin-orbitcoupling for comprehending and understanding photochemistry reaction, photosynthesis, activity for photobiology of druggery, and noctilucence and so on.
自旋-轨道耦合作用作为一种相对论效应，是原子分子物理学中的基本问题，研究它对我们正确理解和认识光化学反应、光合作用、药物的光生物学的活跃性和生物发光等过程至关重要。