光栅最小偏向角法测量汞灯谱线波长的理论和实验验证

Theory and experimental verification of measuring mercury lamp wavelength by the grating least deviation angle method

通过理论推导,给出了最小偏向角的表达式,测量得到最小偏向角的具体数值.实验结果表明,用最小偏向角法测量的波长较对称法更准确,另外,光栅常数也是影响实验误差的原因.

Through theoretical derivation, the expression of the minimum deviation angle is given. We get the accurate values of the minimum deviation angle by measure. The experimental results show that the measurement is more accurate than symmetry method. The results also show that the grating constant is one of the reasons of the experimental error.