It's a backward process but it works.⚡
is converted into electrical energy
There's some common sense to this: whenever an atom in a material gets heated up, it produces ripples of electromagnetic radiation in the form of infrared light. As the Earth cools by radiating energy into space at night, the researchers were able to generate electricity from just that. "Photovoltaics, the direct conversion of sunlight into electricity, is an artificial process that humans have developed in order to convert the solar energy into power," explained Phoebe Pearce, a physicist from the University of New South Wales,
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