本文导出斜入射时,光栅谱线存在最小偏向角的条件及最小偏向角与波长间的关系,据此精确测定了光波波长,并在实验中通过与垂直入射法的比较显出其优越性。
This paper derived the formula explaining the phenomenon of least deviation angle of grating fringe, and precisely measured the wavelength. Compared with the perpendicular incidence method, the least deviation angle method is relatively accurate.