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Efficiency is 13% for CO2 fixation using solar radiation Photosynthesi

  1. May 8, 2005 #1
    What is the approx. efficiency of the conversion of light energy to chemical energy in photosynthesis?

    a. 100%
    b. 95%
    c. 15%
    d. 1%

    I doubt that it is 100%. Is it 15%? I did a search, and I read that the efficiency is 13% for CO2 fixation using solar radiation. I don't know if this is reasonable.

    Thanks for any replies.
  2. jcsd
  3. May 8, 2005 #2


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    Gold Member

    I haven't been on this topic for awhile so excuse me if I'm wrong. But aren't the pigments af light energy stored using adenosine tri-phosphate?(chemical energy) :smile:
  4. May 8, 2005 #3
    You mean, ATP? I think the light reactions (photophosphorylation) make ATP from ADP and P using solar energy.
  5. May 8, 2005 #4
    Going by generalization there is the "Rule of 10". Where roughly each trophic level consumes/converts energy at ~10% efficiency. I think the maximum efficiency is around 20% for levels, so my assumption would be the 15% solution.

    100% should be a giveaway because no metabolic process is going to be perfectly efficient.
  6. May 11, 2005 #5
    prabably about 15%
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