The emission spectrum of a porphyry in dissolved in O,-saturated

The emission spectrum of a porphyry in dissolved in O,-saturated water shows a strong band at 650 nm and a weak band at 1270 nm. In separate experiments, it was observed that the electronic absorption spectrum of the porphyry in sample showed bands at 420 nm and 550 nm, and the electronic absorption spectrum of O,-saturated water showed no bands in the visible range of the spectrum (and therefore no emission spectrum when excited in the same range). Based on these data alone, make a preliminary assignment of the emission band at 1270 nm. Propose additional experiments that test your hypothesis.

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