지슬님은 잘 사시나요? 제가 추가로 세번째 글을 올려 드리지요. Synchrotron radiation is the electronmagnetic radiation emitted by electrons or positrons moving at relativistic velocities along a curved trajectory with a large radius of curvature."Large" here implies that quantum effects are negligible,while they are not.The name itself,"synchrotron" radiation, derives from one specific type of accelerator, the electron synchrotron.