Which interaction produces scatter as a result of vibration of orbital electrons?

Which interaction produces scatter as a result of vibration of orbital electrons?

• A. Photoelectric interaction
• B. Compton interaction
• C. Coherent scatter
• D. Pair production

Answer: (C)

Coherent scattering is the interaction where the electromagnetic field of the incoming photon makes the whole atom’s electrons oscillate in phase. Because the atom returns to its original state, there’s essentially no energy transfer to the atom, so the scattered photon keeps almost the same energy as the incident one, just changing direction. This is elastic scattering involving bound electrons, often called Rayleigh scattering. That’s why this option fits best: it describes scatter produced by the vibration (oscillation) of orbital electrons without energy loss. The other processes involve changing the photon’s energy or producing particles—photoelectric absorption takes the photon energy to eject an electron, Compton scattering transfers energy to a recoil electron (inelastic), and pair production uses the energy to create an electron-positron pair.

Coherent scattering is the interaction where the electromagnetic field of the incoming photon makes the whole atom’s electrons oscillate in phase. Because the atom returns to its original state, there’s essentially no energy transfer to the atom, so the scattered photon keeps almost the same energy as the incident one, just changing direction. This is elastic scattering involving bound electrons, often called Rayleigh scattering.

That’s why this option fits best: it describes scatter produced by the vibration (oscillation) of orbital electrons without energy loss. The other processes involve changing the photon’s energy or producing particles—photoelectric absorption takes the photon energy to eject an electron, Compton scattering transfers energy to a recoil electron (inelastic), and pair production uses the energy to create an electron-positron pair.