一个物理问题，大家帮忙看看啊！

louiegreUID: 204757

97. An atom in an excited state with angular momentum quantum number J = 1 and magnetic quantum number Jz = 0 decays by electric dipole radiation to a state with total angular momentum zero. Which of the following statements is true?
(A)        No photons will be emitted along the z-axis.
(B)        Light emitted along the x-axis will be polarized along the y-axis.
(C)        The photons will be emitted isotropically.
(D)        The particles of the initial and final states are equal.
(E)        More photons will be emitted with wave vector kz > 0 than with kz < 0.

beckhamwiseUID: 142845

选A
光子角动量随机分布在XY平面，z方向合效应为0