JEE (Based on NTA Guidelines-IIT Engg.) Mains Physics Dual Nature of Matter and Radiation-Einstein's Photoelectric Equation Study Material (Page 1 of 1)

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Wave Theory of Light, Explained by Einstein

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Radiation is absorbed by surface is in the form of photon. Energy of photons depends on frequency. one photon can interact with one electron at a time. Interaction between photon and electron is an elastic collision and photon transfers its complete energy to the electron. If energy is sufficient then electron come out without any delay. If intensity of the given source is increased then number of photon increases. So, more number of electron are emitted. And greater saturation current is obtained. It shows that saturation current depend on intensity of the given source is . Only one photon can interact with one electron at a time.

Energy of photo…

… (244 more equations, 29 figures) …

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Laws of Photoelectric Emission, Einstein՚s Photo Electric Equation

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Laws of Photoelectric Emission

  • For a given metal and frequency of incident radiation the number of photo electrons emitted per second is directly proportional to intensity of incident radiation.
  • For a given metal there is a minimum frequency of incident radiation below which no photon emission is possible This s called threshold frequency .
  • Above threshold frequency the maximum kinetic energy of emitted photo electron is independent of intensity of incident radiation but is directly proportional to frequency of incident…

… (147 more equations) …

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