The features of hydrogen spectrum: discontinuous spectrum (line spectrum) the frequency of the visible line spectrum meets with the following empirical equation: -329×10(-x n n=3 red红(Ha) n=4 blueness青(HB) n=3,4,5,6,. n=5 blue-purple蓝紫Hy) n=6 purple紫(H6) But what does 2,n,3.289X 1015 mean in the empirical equation?Unclear at that time • discontinuous spectrum (line spectrum) • the frequency of the visible line spectrum meets with the following empirical equation: 1 2 2 1 5 )s 1 2 1 3.289 10 (     n v n= 3,4,5,6, … But what does 2，n，3.289×1015 mean in the empirical equation? Unclear at that time The features of hydrogen spectrum： n = 3 red 红（Hα） n = 4 blueness 青（Hβ) n = 5 blue-purple 蓝紫(Hγ) n = 6 purple 紫（Hδ)