Thermionic emissions are related to

are related as

A : The process of photoelecton emission and thermionic emission of electrons is different . R : Photoelectric emission does not depend upon tempereature , whereas thermionic emission is temperature depandent .

Why does thermionic emission not take place in nonconductors?

Explain thermionic emission, field emission and photoelectric emission.

Photoelectric Emission

Statement (A): Alkali metals exhibit photo electric effect when they illuminated with visible light. Statement (B): Photoelectric emission is also like thermionic emission.

Let i_0 be the thermionic current from a metal surface when the absolute temperature of the surface is T_0 . The temperature is slowly increased and the thermionic current is measured as a function of temperature. Which of the following plots may represent the variation in (i/i_0) against (T/T_0) ?

The phenomenon of photoelectric emission was discovered in 1887 by

In photoelectric emission, the energy of the emitted electron is

Appropriate measures to reduce overall greenhouse gas emissions are the commitments of the :