Photo Electric Effect is the ultimate silver bullet that killed the Classical Physics vampire(Now it seems not to be so !? Click Here . This light business is giving lot of headache to physicists) and gave birth to the new ideas and shocking quantum mechanics at the turn of the past century.
Experimental physicists Richardson and his student Karl T.Compton (Not to be confused with Arthur Holly Compton of Compton Effect fame, I confused and made a glitch in my lecture sorry for that) performed this crucial experiment to bring out the nuances of Photo Electric Effect which contrasted it well with the classical theory.
