Explain- The role of threshold frequency is photoelectric effect is ini agreeement withh the particle nature of light and in disagreement with the wave nature of light.

Explanation

According to wave theory of light, photoelectriic effect can occur by increasing the intensity of the incident light. However, according to particle theory there is a minimum frequency (threshold frequency), for each metal below which, photoelectric effect is not possible (no matter how high is the intensity of light).
It has beenn experimentally proved that photoelectric effect depends on the frequency of the incident light but not on its intensity. the threshold frequency of each metal is unique. hence photoelectric effect can be successfully explained with the help of particle nature of light.