A single quantum of electromagnetic radiation is:
Correct answer: A. Photon
- A. Photon
- B. Proton
- C. Meson
- D. Positron
Explanation
A single quantum of electromagnetic radiation is called a "photon." Photons are elementary particles that represent a discrete amount of energy associated with electromagnetic waves. The energy of a photon is quantized and is directly proportional to the frequency of the associated electromagnetic wave. Photons exhibit both wave-like and particle-like properties, and they play a crucial role in the quantum theory of electromagnetic radiation.
This question appeared on the ETEA MDCAT 2008 paper, which you can sit online with every answer explained.
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About Photons and the Particle Model of Light
The particle model treats light as photons with energy E equals hf and momentum related to wavelength. Questions involve the photoelectric effect, work function, threshold frequency, stopping potential and photon energy, while distinguishing particle behaviour from the wave description of interference and diffraction.
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