Difference between Photoelectric effect and Wave theory
Before Quantum mechanics there was a huge argument about the nature of light either it is particle nature or wave nature. The photoelectric effect has a unique attraction in quantum mechanics because it proves the particle nature of light. When the electromagnetic radiation are incident on the metal surface (Conductors) then a electron in a these material absorbs the energy from the photon and acquires more energy than its binding energy then it will ejected from the material in the form of photoelectrons. Electrons are ejected only when the frequency of the incident light is higher than a threshold value so it is necessary that the frequency of incident light is greater than the threshold frequency. According to classical wave theory, electrons require some time to gain sufficient energy to escape from the meta but photoelectric effect oppose this assumption and proves that emissions of photoelectrons is instantaneous process. According to wave theory of light the kinetic energy maximum is depends on light intensity. Photoelectric effect gives the relation between the stopping potential and the threshold frequency. Both Photoelectric effect and wave theory gives there best to explains there points and assumptions. The difference between them is as follows
Photoelectric effect | Wave theory |
1) The photoelectric effect proves that maximum kinetic energy is not depend on the change in intensity.
2) The photoelectric effect gives relation of threshold frequency. 3) According to photoelectric effect emissions of photoelectrons is instantaneous process. 4) Photoelectric effect proves that the light has a particle nature. 5) The photoelectric effect gives relation of stopping potential .
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1) According to the wave theory, the maximum kinetic energy of the photoelectron should be affected by the change in intensity.
2) Wave theory is fails to explain the threshold frequency. 3) According to classical wave theory, electrons require some time to gain sufficient energy to escape from the metal. 4) Wave therory proves that the light has a wave nature. 5) Th wave theory fails to explain the threshold frequency.
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