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What are Einstein's 3 postulates for Photo electric effect?

  1. Oct 23, 2014 #1
    There are certain conclusions that can be explained by quantum physics about the photoelectric effect:
    1) photoelectrons only emitted if frequency>threshold frequency and hence energy of photon> work function
    2)Increasing intensity increases no. of photons (and thus photoelectrons provided f>f0 ) and NOT the kinetic energy

    But what are the actual postulates (3) proposed by Einstein?
    Something like electron discrete energy packets (i'm not really sure).
    Can you help me out
  2. jcsd
  3. Oct 23, 2014 #2
    The discrete enery packets where as far as I know originally postulated by Max Planck who found a equation that discribes the black body radiation after Wien and ralley jeans law where thought of. But Einstein cirtenly did work on energy levels, I do not doubt that.
  4. Oct 23, 2014 #3

    Simon Bridge

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