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The photoelectric effect is a phenomenon in which electrons are emitted from a material (typically a metal) when it is exposed to electromagnetic radiation, such as light. The effect was first observed by Heinrich Hertz in 1887 and was later explained by Albert Einstein in 1905, which contributed to the development of quantum theory.

Ancestors (6)

  1. Albert Einstein
  2. Philosophy of science
  3. Analytic philosophy
  4. History of mathematics
  5. Mathematics
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