One photon kicks off photosynthesis.

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      News CHEMISTRY For photosynthesis, one photon is all it takes. The team detected that second photon and, by comparing the detection time with that of the initial herald photon, confirmed that LH2 needed to absorb only one photon to kick things off. The emitted photon had a different wavelength than the absorbed photon, a sign that energy had been transferred between LH2's two rings, a first step of photosynthesis. [Extracted from the article]
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