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What thermionic emission means

What thermionic emission means

Thermionic emission from a heated metal filament showing electrons escaping the surface and the work function barrier Thermionic emission is the release of electrons from the surface of a heated metal. In a metal, conduction electrons can move through the lattice, but they still need enough energy to escape the surface completely.

Thermionic emission of electrons (A-level only) Lesson

  1. A Level
  2. /Physics
  3. /Thermionic emission of electrons (A-level only)

Step-by-step lessons on AQA A Level Physics Thermionic emission of electrons (A-level only). Each one builds up to exam-style questions. Physics is one of the most mathematically demanding A Levels -- at least 40% of the marks require maths skills at Level 2 (GCSE) standard or above, so build calculation and graph-handling fluency alongside the conceptual content from the start.

Lessons