Monday, 25 April 2016

Photoelectric effect


Photoelectric effect

Photoelectric emission is the phenomena by which a good number
of  substances, chiefly  metals,emit  electrons  under  the  influence  of radiation such as γ rays, X-rays, ultraviolet and even visible light. This effect  was  discovered  by  Heinrich  Hertz  in  1887  while  working  with resonance electrical circuits. Hallwachs,Elster and Geitel investigated the phenomenon with a simple experimental arrangement after one year.