Please explain how this is. It seems like something could convert all energy to light without generating heat and while conserving total energy & mass...
Well, the law they're referring to states that rather than just conserving energy and mass you also can't have a process that lowers entropy. Although it's unclear how this is relevant because, if anything, converting kinetic energy to light increases entropy, or at the very least doesn't decrease it.
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Please explain how this is. It seems like something could convert all energy to light without generating heat and while conserving total energy & mass...
Well, the law they're referring to states that rather than just conserving energy and mass you also can't have a process that lowers entropy. Although it's unclear how this is relevant because, if anything, converting kinetic energy to light increases entropy, or at the very least doesn't decrease it.