Conventional solar technology soaks up rays of incoming sunlight to bump out a voltage. Strange as it seems, some materials are capable of running in reverse, producing power as they radiate heat back into the cold night sky.
A team of engineers in Australia has now demonstrated the theory in action, using the kind of technology commonly found in night-vision goggles to generate power.
By setting atoms in any material jiggling with heat, you're forcing their electrons to generate low-energy ripples of electromagnetic radiation in the form of infrared light. What hasn't been entirely clear is how this particular trick might be used efficiently as an actual power source.generated a power density of 2.26 milliwatts per square meter.
But that's not really the point, either, given it's still very early days in the field, and there's potential for the technology to develop significantly further in the future.
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