Question:

Einstein was awarded the Nobel Prize for his work on

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It is a common misconception that Einstein won for Relativity. At the time, Relativity was still considered too controversial or not "experimentally proven" enough by the Nobel committee.
Updated On: Apr 29, 2026
  • Photoelectric effect
  • Special theory of relativity
  • Brownian motion
  • General theory of relativity
  • Quantum theory
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The Correct Option is A

Solution and Explanation

Concept:
Albert Einstein was awarded the 1921 Nobel Prize in Physics. While he is most famous for relativity, the citation specifically recognized his services to Theoretical Physics, and especially for his discovery of the law of the photoelectric effect. \textbf Understanding the Significance.
In 1905 (his "Annus Mirabilis"), Einstein proposed that light consists of discrete packets of energy called "quanta" (later photons). This successfully explained why the energy of ejected electrons depended on light frequency, not intensity—a phenomenon classical physics could not explain.
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