通过对原子能级及气体放电原理的研究和讨论,提出变色的途径和方法,由实验观察不同条件下放电管变色现象,得出最易变色的实验值。 Based on the research and discussion of atomic energy level and gas discharge principle, the ways and methods of discoloration were put forward. The discoloration phenomenon of discharge tube under different conditions was observed experimentally to get the most easily discolored experimental value.