Thermionic emission

Thermionic emission is the thermally induced flow of charge carriers from a surface or over a potential-energy barrier. This occurs because the thermal energy given to the carrier overcomes the work function of the material. The charge carriers can be electrons or ions, and in older literature are sometimes referred to as "thermions". After emission, a charge that is equal in magnitude and opposite in sign to the total charge emitted is initially left behind in the emitting region. But if the emitter is connected to a battery, the charge left behind is neutralized by charge supplied by the battery as the emitted charge carriers move away from the emitter, and finally the emitter will be in the same state as it was before emission.

The classical example of thermionic emission is the emission of electrons from a hot cathode into a vacuum (also known as thermal electron emission or the Edison effect) in a vacuum tube. The hot cathode can be a metal filament, a coated metal filament, or a separate structure of metal or carbides or borides of transition metals. Vacuum emission from metals tends to become significant only for temperatures over 1,000 K (730 °C; 1,340 °F). The science dealing with this phenomenon has been known as "thermionics", but this name seems to be gradually falling into disuse.

Edison

Edison may refer to:

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To You

"To You" is a 1939 song composed by Tommy Dorsey with Benny Davis and Ted Shapiro. The song was a top 10 hit on the Billboard charts.

Other recordings

"To You" was recorded by Glenn Miller and His Orchestra with vocals by Ray Eberle and released as an RCA Bluebird 78. Glenn Miller also performed the song at the 1939 Carnegie Hall Concert, which was released in 1958 by RCA Victor on the album The Glenn Miller Carnegie Hall Concert. "To You" appeared as part of a medley by Glenn Miller and his Orchestra, paired with "Stairway to the Stars", both sung by Ray Eberle at the live performance at Carnegie Hall on October 6, 1939. Glenn Miller recorded "To You" for Bluebird records on May 9, 1939 released as Bluebird 10276-B, with the "A" side, "Stairway To The Stars" both sung by Ray Eberle.Ella Fitzgerald and Paul Whiteman also recorded the song. The song was featured by Harry Richman in the International Casino Revue Hello Beautiful in 1939.

Harry James recorded the song with Frank Sinatra on vocals.

Back to You (disambiguation)

Back to You was a short-lived American situation comedy series.

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Comeback

Comeback, The Comeback or Come Back may refer to:

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