Kinetic energy with which the electrons are emitted from the metal surface due to Photoelectric effect is
1) independent of the intensity of illumination
2) independent of the frequency of light
3) inversely proportional to the intensity of illumination
4) directly proportional to the intensity of illumination
The superposition takes place between two waves of frequency f and amplitude a. The total intensity is directly proportional to
[MP PMT 1986]