中文摘要：

讨论在反射法测量三棱镜顶角的实验中,三棱镜在分光计载物台上摆放位置对测量的影响,并提出三棱镜在载物台上的最佳摆放位置。

英文摘要：

In this paper,the place for prism on the stage of spectrometer were discussed and the best placement were given,when the vertex angle of prism was determining by reflection method.