In a photon-particle collision, the quantity that does not remain conserved is?
Correct answer: C. Number of photons
- A. Total energy
- B. Total momentum
- C. Number of photons
- D. None of these
Explanation
In a photon - particle collision, the number of photons may not be conserved. The photon may be absorbed or a new photon may be created.
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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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