Which of the following physical phenomena can not be described only by the wave theory of electromagnetic radiation?

مندرجہ ذیل میں سے کون سا جسمانی مظاہر صرف برقی مقناطیسی تابکاری کی لہر تھیوری سے بیان نہیں کیا جا سکتا؟

Diffraction

interference

Photoelectric emission

Polarization

The process by which free electrons are emitted from the metal surface by the application of light is called photoelectric emission.