Which theory explains photoelectric effect?

What is photoelectric effect?

Name the scientist who explained photoelectric effect.

What is Einstein's photoelectric equation? Explain how it satisfies the various laws of photoelectric effect?

Using photon picture of light, show how Eintein's photoelectric equation can be established. Write two features of photoelectric effect which cannot be explained by wave theory.

Draw a graph showing the variation of stopping potential with frequency of incident raditions in relation to photoelectric effect. Deduce an expression for the slope of this graph using Einstein's photoelectric equation.