question_answer

According to Einstein's photoelectric equation, the graph between the kinetic energy of photoelectrons ejected, and the frequency of incident radiation is

A)          

B)

C)           

D)

Correct Answer: D

Solution :

The maximum kinetic energy of photoelectron ejected is given by \[\operatorname{KE}=\,\,h\nu -W\,\,=\,\,h\nu -\,\,h{{\nu }_{0}}\]where, work function depends on the type of material.   If the frequency of incident radiation is greater than \[{{\nu }_{0}}\] only then the ejection of photoelectrons start. After that as frequency increases kinetic energy also increases.