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The study of photoelectric effect is useful in understanding :

$\begin{array}{1 1}(a)\;\text{Conservation of energy}\\(b)\;\text{Quantization of charge}\\(c)\;\text{Conservation of charge}\\(d)\;\text{Conservation of kinetic energy}\end{array}$

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  • Study of the photoelectric effect led to important steps in understanding the quantum nature of light and electrons and influenced the formation of the concept of wave–particle duality.
  • The photons of a light beam have a characteristic energy proportional to the frequency of the light.
  • All of the energy from one photon must be absorbed and used to liberate one electron from atomic binding, or else the energy is re-emitted. If the photon energy is absorbed, some of the energy liberates the electron from the atom, and the rest contributes to the electron's kinetic energy as a free particle.
The radiation energy absorbed is used to overpower effective nuclear charge and importing velocity to electron.
Hence (a) is the correct answer.
answered Jan 10, 2014 by sreemathi.v
edited Apr 2, 2014 by mosymeow_1

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