Sentences with phrase «excite electrons in the material»

Not exact matches

Invented in 1960, lasers use an external «pump,» such as a flash lamp, to excite electrons within the atoms of a lasing material — usually a gas, crystal, or semiconductor.

Laser light occurs when most of a material's electrons are in an excited, or higher, energy state.

One can select materials to exploit the Hi End photons, in the UV spectrum say, but, should one do so, the great abundance of the Red, Orange, Yellows, & Greens, etc., fall uselessly upon the collector, unable to excite any given electron to the Valence relevance.