A) interference
B) photoelectric effect
C) diffraction
D) polarisation
Correct Answer: B
Solution :
According to quantum theory light travels in small bundles or packets of energy known as photons. The energy of photon in such case is\[hv\], where h is Planck's constant and \[v\] the frequency of light. The intensity of light depends on the number of these photons. Einstein explained the phenomenon of photoelectric effect on the basic of Planck's quantum theory. Note: Interference, diffraction and polarisation proved the wave nature of light.
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