In this paper, we discussed the transitionselection rule of electrical dipole radiation in atom physics by the parity theory and angular momentum theory in quantum.
However, the selection criteria of the transition point needs to be further studied and optimized.
然而，转变点的标准的选取和优化还要进一步的研究。
3
The theoretical calculation value of some common transition fit is compared with practical statistical value, which is of practically reference to the accuracy selection in mechanical design.