特殊用法annihilation (radiation) photon1.湮没辐射光子background noise photon1.背景噪声光子de-excitation photon1.去激发光子light photon1.可见光子longitudinal photon1.纵光子oppositely directed photons1.反方向传播的光子optical photon1.光量子ultraviolet photon1.紫外光子virtual photon1.虚光子visible photon1.可见光子