The process through which free electrons leave the surface of hot metal is known as?

Assessment: JAMB UTME - Physics - 2006 Subject: Physics

Question 1 Report

The process through which free electrons leave the surface of hot metal is known as?
Answer Details
The process through which free electrons leave the surface of a hot metal is known as thermionic emission. When a metal is heated to a high temperature, some of its electrons gain enough energy to escape the metal's surface and become free electrons. This phenomenon is called thermionic emission, and it is used in devices such as vacuum tubes and cathode ray tubes. The other options, photon emission, photoemission, and electron emission, are different processes that involve the emission of electrons or photons but not specifically related to the process of free electrons leaving the surface of a hot metal.
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