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The [[Quantum_mechanics#Photoelectric_effect|photoelectric effect]] shows that a [[light]] [[photon]] which has enough [[energy]] (a high eno ...

...crete wave packets ([[photons]]), each with energy. Einstein said that the effect was due to a photon striking an electron. This demonstrated the particle na ...in also found that electromagnetic radiation with a long wavelength had no effect. Einstein said that this was because the "particles" did not have enough en ...

[[File:Photoelectric effect.svg|150px|thumb|Photoelectric effect: photons hit metal and electrons are pushed away.]] ...ehaves both like a wave and like a particle, not just light. However, this effect is much smaller in large objects. ...