The Electron: Thermionic Emission 2

Flashcards by alex.examtime9373, updated more than 1 year ago
Created by alex.examtime9373 about 7 years ago


This flash card deck covers the topic of thermionic emission, work function and cathode ray tubes. It is best used alongside the mind map on the electron and the note on thermionic emission.

Resource summary

Question Answer
Thermionic emission The emission of electrons from the surface of a hot metal
Temperature requirement for thermionic emission 800 degrees celsius
Work function The minimum energy needed to remove an electron from a metal to a point in the vacuum immediately outside the solid surface
Cathode Ray Tube A vacuum tube in which images are produced when an electron beam strikes a phosphorescent surface
Components of a cathode ray tube Filament, cathode, anoder, vacuum tube, fluorescent screen
Energy conversion in a cathode ray tube Kinetic energy --> light energy
Practical use of a cathode ray tube Televisions
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