Which among the following phenomenon shows particle nature of light?
Correct answer: A. Photoelectric effect
- A. Photoelectric effect
- B. Interference
- C. Polarization
- D. Matter waves
Explanation
The photoelectric effect occurs when light ejects electrons from a metal surface, which can only be explained if light consists of particles (photons) with discrete energy packets. This confirms the particle nature of light as explained by Einstein's photon theory.
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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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