Which among the following phenomena shows the particle nature of light?
Correct answer: A. Photoelectric effect
- A. Photoelectric effect
- B. Interference
- C. Polarization
- D. Matter waves
Explanation
The phenomenon in which an incident ray of light is ejected from the surface of a metal when light is incident on it, is called the Photoelectric Effect. In the photoelectric effect, the light causes electrons to be released on the surface of a metal. When light energy strikes the metal surface, it does so in the form of energy packets. This proves the particle nature of light.
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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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