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The
first truly realize the importance of energy are quantized Einstein
(Albert Einstein), he was in 1905 when the photoelectric effect
proposed a reasonable explanation, which was the scientific community
there is a very far-reaching impact. Photoelectric effect is in 1887 by
the German scientist Heinrich Hertz discovered. Experiment, in order to
produce a photoelectron, the frequency of exposure to light must be
greater than a critical value no, the different metal surfaces have a
different threshold. If this frequency is less than the intensity of
light and then there will not be strong photoelectron generated. This
is clearly unable to classical physics, only with the amplitude-squared
fluctuations in energy-related theorems to explain. Einstein considered
the photoelectric effect, we must assume that just to many hearts
particles (photons) of the morphology and the role of electrons on
metal surfaces, and each photon energy with an electromagnetic wave
patterns in the frequency of vibration into the proportional, while the
constant of proportionality was later found the same with the Planck
constant.
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