Which among the following shows the particle nature of light?
Correct answer: D. Photoelectric effect
- A. Interference
- B. Reflection
- C. Polarization
- D. Photoelectric effect
Explanation
The photoelectric effect is a phenomenon that can only be explained by considering the particle nature of light. When light is considered as discrete packets of energy (photons), the interaction between photons and electrons in a material leads to the emission of electrons, which is the essence of the photoelectric effect. Therefore, option D is the correct choice as it directly demonstrates 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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