光电子放射

例句：

1. 1. The laser beam is emitted from the laser gun.
   激光束从激光器中发射出来。
2. 2. The radio waves are radiating out from the antenna.
   无线电波从天线辐射出去。
3. 3. The electrons are emitted from the cathode and accelerated towards the anode.
   电子从阴极发射并加速向阳极移动。