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What energy exactly does photosynthesis extract from sunlight?
Photosynthesis, the biological conversion from light energy to chemical energy... But I thought photons have zero mass (therefore zero energy?), so where is this energy coming from? Does it just refer to the extremely small energy that comes from a photon's momentum?
Answer:
Photons have energy even if they dont have mass (rest mass). Both subjects are not directly related.
The energy of a photon is calculated as Energy=frecuency*plank constants and is usally measured in electronvolts. The average photon in solar radiation has an energy of 1.5 electronvolts.
Again, no mass is required.
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