Which one among these shows particle nature of light.
A
Photoelectric effect (P.E.E.)
B
Interference
C
Refraction
D
Polarization
The answer is A.
Solution
Interference, diffraction and polarisation can be explained only by the wave nature of light. Refraction can be explained by the wave theory too. The photoelectric effect (instant emission, threshold frequency, and kinetic energy depending on frequency but not intensity) cannot be explained by waves. Einstein explained it by treating light as made of particles (photons) of energy $h\nu$. So the photoelectric effect shows the particle nature of light.
ConceptPhotoelectric effect shows photons
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