Definitions for thermionic emission
thermion·ic emis·sion

Princeton's WordNetRate this definition:0.0 / 0 votes

1. thermionic emission, thermal emissionnoun

   the emission of electrons from very hot substances

ChatGPTRate this definition:0.0 / 0 votes

1. thermionic emission

   Thermionic emission is a process in which heat energy causes the release or emission of electrons from a material, typically a metal or a metallic compound. This phenomenon is also known as the "Edison effect" as it was first observed by Thomas Edison. The electrons gain enough kinetic energy to overcome the work function or binding energy of the material, resulting in the emission of free electrons. This process is used in many electronic devices including thermionic valves and cathode ray tubes.

WikidataRate this definition:0.0 / 0 votes

1. Thermionic emission

   Thermionic emission is the heat-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 binding potential, also known as work function of the metal. The charge carriers can be electrons or ions, and in older literature are sometimes referred to as "thermions". After emission, a charge will initially be left behind in the emitting region that is equal in magnitude and opposite in sign to the total charge emitted. But if the emitter is connected to a battery, then this charge left behind will be 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 thermionic emission of electrons is also known as thermal electron emission. The classical example of thermionic emission is the emission of electrons from a hot cathode, into a vacuum 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 1000 K. The science dealing with this phenomenon has been known as thermionics, but this name seems to be gradually falling into disuse.

Matched Categories

1. • Emission

How to pronounce thermionic emission?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say thermionic emission in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of thermionic emission in Chaldean Numerology is: 3

2. Pythagorean Numerology

   The numerical value of thermionic emission in Pythagorean Numerology is: 1

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=thermionic emission
2. ^ ChatGPT
   https://chat.openai.com
3. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=thermionic emission