Einstein was awarded Nobel prize for the explanation of photoelectric effect in:
Correct answer: B. 1921
- A. 1905
- B. 1921
- C. 1925
- D. 1934
Explanation
Albert Einstein was awarded the Nobel Prize in Physics in 1921 for his explanation of the photoelectric effect. In his groundbreaking 1905 paper on the photoelectric effect, Einstein proposed that light consists of discrete packets of energy called photons. His work provided evidence for the idea that energy is quantized in quantum physics.
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About Dawn of Modern Physics
Classical physics cannot explain blackbody radiation and related observations, leading to Planck’s quantum theory, in which energy is emitted or absorbed in discrete packets. Photons provide the particle model of light, with energy and momentum linked to frequency and wavelength, including the photoelectric effect and its threshold frequency.
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