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Unformatted text preview: 2 0  )/ 8 N A h ν where the first 3 factors give the fraction of incident photons effectively used in photosynthesis. η P is the trapping efficiency of the photoexcitation by the reaction centers. η P ~ 0.8. η R , is the reflectivity factor. η R ~ 0.8. η S , is the spectral efficiency, i.e. the fraction of light with sufficient energy. η s ~0.33. Using the values given above we obtain the overall efficiency as: η ∼ 0.1 which may be achieved under favorable conditions, although experimentally the efficiency is closer to 0.07. The details of how each factor above was evaluated is given in the full paper. Recall the half reactions we are talking about: CO 2 + 4e C + 2O = 2H 2 O O 2 + 4e+ 4H +...
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 Fall '11
 Rasmussen
 Chemistry, Photosynthesis, Energy, Photon, Environmental Biophysics

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