Photoelectric Effect

Light shows dual character at times it behaves as a wave and at times as particle. While interference, diffraction show the wave nature of light, particle nature is supported by photoelectric effect.

According to quantum theory light travels in small bundles or packets of energy known as photons. The energy of photon in such case is where is Plancks constant and 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 Plancks quantum theory. Note: Interference, diffraction and polarization proved the wave nature of light.