Технические науки в целом

Список источников >Нехудожественная литература >Научная и техническая литература >Техника. Технические науки >Технические науки в целом >

Gas-discharge lamp

Автор: Jesse Russel
Год: 2012
Издание: Книга по Требованию
Страниц: 111
ISBN: 9785513619734
High Quality Content by WIKIPEDIA articles! Gas-discharge lamps are a family of artificial light sources that generate light by sending an electrical discharge through an ionized gas, i.e. a plasma. The character of the gas discharge critically depends on the frequency or modulation of the current: see the entry on a frequency classification of plasmas. Typically, such lamps use a noble gas (argon, neon, krypton and xenon) or a mixture of these gases. Most lamps are filled with additional materials, like mercury, sodium, and/or metal halides. In operation the gas is ionized, and free electrons, accelerated by the electrical field in the tube, collide with gas and metal atoms. Some electrons in the atomic orbitals of these atoms are excited by these collisions to a higher energy state. When the excited atom falls back to a lower energy state, it emits a photon of a characteristic energy, resulting in infrared, visible light, or ultraviolet radiation. Some lamps convert the ultraviolet...
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