Emission or Absorption of a Photon - Dipole Needed?

Buckeye

If photons are emitted or absorbed when a pair or a collection of particles, that are or behave as dipoles, undergo oscillation by some driving force, are there any systems that do NOT use a single or collective dipole oscillation to emit or absorb a photon?

DaTario

no charge moving no photon as it seems to me.

Meir Achuz

All multipoles (other than monopole), quadrupole, octopole, etc.
can emit and absorb photons.

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Buckeye	Emission or Absorption of a Photon - Dipole Needed? Tweet If photons are emitted or absorbed when a pair or a collection of particles, that are or behave as dipoles, undergo oscillation by some driving force, are there any systems that do NOT use a single or collective dipole oscillation to emit or absorb a photon?

Meir Achuz Recognitions: Homework Help Science Advisor	All multipoles (other than monopole), quadrupole, octopole, etc. can emit and absorb photons.