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LASER INVISÍVEL que DESENHA?
O que acontece quando você pinta um CD com tinta fosforescente e risca ele usando um laser que nem deveria ser visível? Objetos fosforescentes têm um truque curioso: eles “guardam” parte da luz que recebem e devolvem isso depois, como se estivessem respondendo com brilho próprio. O resultado é um desenho feito só com luz — e a ...
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