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Essa luz verde não está sendo “criada” ali. Ela já estava escondida dentro da molécula. O que você está vendo é fluorescência: um fenômeno em que certas substâncias absorvem radiação ultravioleta e devolvem parte dessa energia na forma de luz visível. Nesse experimento, o brilho acontece por causa da riboflavina, também chamada de vitamina B₂. As moléculas da riboflavina possuem elétrons que absorvem a energia da luz UV e saltam para níveis eletrônicos mais energéticos. Mas esse estado dura mu
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