Practice portal › Dual Nature of Matter and Radiation › Conceptual and Statement Questions on the Photoelectric Effect
Asked in GSEB Board July 2023 · Conceptual points of the photoelectric effect
Idea: in the photon picture, light interacts with matter as particles carrying energy E = h u and momentum p = h/λ.
A photon and a particle (such as an electron) colliding form an isolated system, so total energy and total momentum are both conserved.
The number of photons, however, need not be conserved: a photon may be absorbed or a new photon created.
So in a photon-particle collision, total energy and total momentum are conserved.
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