1885年,瑞士物理学家巴耳末对氢原子光谱中在可见光区的四条谱线做了分析,发现这些谱线的波长能够用一个公式表示,即1/λ=R(1/2~2-n~2)(n=3,4,5……),式中R叫李德伯常量,实验测得的值为R=1.10×10~7m~(-1),因为这个公式仅仅是巴耳末对氢原子光谱作仔细观察得到的而不是通过理论计算得出 In 1885, the Swiss physicist Barz analyzed the four lines in the visible region of the atomic hydrogen spectrum and found that the wavelengths of these lines can be expressed as a 1 / λ = R (1/2 - 2 - n ~ 2) (n = 3,4,5 ......), where R is called Lydberg constant, the experimental value is R = 1.10 × 10 ~ 7m ~ (-1), because this formula is only Baer At the end of the hydrogen atomic spectra for careful observation obtained rather than by theoretical calculations