electron emission
Particles escaping surfaces
Electron emission is the release of electrons from a surface, typically metal, into surrounding space.
This occurs through various mechanisms: thermionic emission uses heat, photoelectric emission uses light, and field emission uses strong electric fields.
The phenomenon underlies vacuum tubes, electron microscopes, and cathode ray technology.
The filament's electron emission increases as it heats up.
- cold cathodeElectrode emitting without heat
- photoelectronLight-expelled negative particle
- tungsten filamentHeated wire producing illumination
- Richardson equationThermal electron emission formula
- particle acceleratorDevice speeding subatomic bits
vacuum tube · kinetic energy · atomic orbitals · ultraviolet light · cathode ray tube · tungsten · heated · phosphor · liberation · plasma · spark · cathode · voltage · CRT · filament · ionization · current · fluorescent
- emissionsemissions, CO2, CO2 emissions, carbon footprint, greenhouse gases
- beta decaybeta particle, beta radiation, antineutrino, neutrino, weak force
- photoelectricsphotoemission, photoelectron, photocell, photodetector, photodiode
- ultrafast opticsfemtosecond, autocorrelation, dispersion, streaking, bandwidth limit