Photoelectric Effect#!#Dual Nture of Matter and Radiation

In photoelectric effect

In photoelectric effect

In photoelectric effect,

In photoelectric effect,

Dual Nature Of Electromagnetic Radiation

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In the photoelectric effect, if the frequency of the radiation is below a certain cutoff value, no photoelectrons will be observed no matter how intense the radiation is. Why does this fact favour a particle theory of light over a wave theory?

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Dual nature of radiation is shown by

In photoelectric effect , if a week intensity radiation instead of strong intensity of suitable frequency is used then