Which one of the following statements on photoelectric effect is not correct?
1
Albert Einstein received the Nobel Prize in Physics for explaining photoelectric effect
2
For each metal, there is a threshold frequency ν0 below which this effect is not observed
3
At a frequency ν > ν0, the kinetic energy of ejected electrons does not change on increasing the frequency of incident light
4
The number of electrons ejected is proportional to the intensity of incident light