Define the term "Intensity" in photon picture of electromagnetic radiation.

Summarise the photon picture of electromagnetic radiation .

Write the basic features of photon pictures of electromagnetic radiation on which Einstien's photoelectric equation is based.

(a) Why photoelectric effect can not be explained on the basis of wave nature of light ? Give reasons. (b) Write the basic features of photon picture of electromagnetic radiation on which Einstein's photoelectric equation is based.

Write Einstein's photoelectric equation. State clearly how this equation is obtained using the photon picture of electromagnetic radiation. Write the three salient features observed in photoelectric effect which can be explained using this equation.

(a) Why photoelectric effect cannot be explained on the basis of wave nature of light? (b) Write the basic features of photon picture of electromagnetic radiation on which Einstein's photoelectric equation is based.