本题目来源于试卷: Physics Unit32: Elementary Particles，类别为 国际高中通用物理
[单选题]
When a positronium atom (electron + positron) depbf., d4-tph gqh8eqp 85lef d:+iye b*1f3picays, it emits two photonsjth9ih vtkz3m ;rp:8 47bsu:w . What are the energies of the phou3hrp;szti: m: 8947ht kbvjwtons?
A. 0.511 MeV and 1.022 MeV
B. 0.225 MeV and 0.285 MeV
C. 0.256 MeV and 0.256 MeV
D. 0.511 MeV and 0.511 MeV
参考答案: D
本题详细解析:
暂无
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