Transition Radiation
When a charged particle passes through a homogeneous dielectric media at a speed greater than the phase velocity of electromagnetic wave in that media it emits electromagnetic radiation, which is known as Vavilov Cherenkov radiation. In a case of not homogeneous media, like a media having boundary with another media, additional radiation takes place and it is called Transition Radiation (TR).
Read more about Transition Radiation: History, Optical Transition Radiation
Famous quotes containing the words transition and/or radiation:
“There is not any present moment that is unconnected with some future one. The life of every man is a continued chain of incidents, each link of which hangs upon the former. The transition from cause to effect, from event to event, is often carried on by secret steps, which our foresight cannot divine, and our sagacity is unable to trace. Evil may at some future period bring forth good; and good may bring forth evil, both equally unexpected.”
—Joseph Addison (1672–1719)
“There are no accidents, only nature throwing her weight around. Even the bomb merely releases energy that nature has put there. Nuclear war would be just a spark in the grandeur of space. Nor can radiation “alter” nature: she will absorb it all. After the bomb, nature will pick up the cards we have spilled, shuffle them, and begin her game again.”
—Camille Paglia (b. 1947)