How does photoelectric experiment prove the particle aspect of light in opposed to be solely wave-like?

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    $\begingroup$ Does this answer your question? Can the photoelectric effect be explained without photons? $\endgroup$ – A. P. Jan 17 at 20:35
  • $\begingroup$ The particle aspect of a light with photons is fairly self-explanatory. What’s hard to explain is a light wave. Billions of coherent photons radiating from a common source resemble a wave but they are still individual particles. $\endgroup$ – Bill Alsept Jan 17 at 21:10
  • $\begingroup$ @BillAlsept This must be some joke. $\endgroup$ – my2cts Jan 17 at 23:47
  • $\begingroup$ @my2cts you can physically describe and explain light with particles. You cannot even begin to describe a light wave without incorporating billions of individual photons. $\endgroup$ – Bill Alsept Jan 18 at 0:01

There was a zinc plate that when irradiated with ultraviolet light emitted electrons (charged particles) to a detector which could detect them. It was observed that there was a minimum energy to the light before the photoelectric effect could be observed. It was postulated that photons come in wavepackets. Planck relation gives: $E = h \nu$

Maybe this diagram helps:



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