The transfer of energy directly from a photoexcited electron in a pigment molecule to another electron in an adjacent pigment molecule occurs by

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Resonance energy transfer is the process by which energy is transferred directly from a photoexcited electron in one pigment molecule to another electron in a nearby pigment molecule without the electron itself moving. This process is fundamental in photosynthesis, allowing energy to move efficiently between pigment molecules until it reaches the reaction center.

The Transfer of Energy Directly from a Photoexcited Electron in a Pigment