Researchers break a fundamental rule to create a new concept: Heat that can be directed and 'programmed'
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PhysResearchers break a fundamental rule to create a new concept: Heat that can be directed and 'programmed'phys.orgNormally, a material absorbs and emits heat in a linked way: A surface that absorbs heat well at a certain wavelength and direction will also emit heat in the same way. This fundamental relationship, known as reciprocity, limits the ability to independently control heat absorption and heat emission.
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