Why are alkali metals most suited for photoelectric emission?

Asked by Topperlearning User | 4th Jun, 2014, 01:23: PM

Expert Answer:

The work function of alkali metals is quite low (e.g. for potassium, it is 2.3 eV and for sodium is 2 eV). As a result, they show photoelectric effect even with visible light. For this reason, alkali metals are most suited for photoelectric emission.

 

Answered by  | 4th Jun, 2014, 03:23: PM