Resumen de The paint that uses the sun to cool your home
A high-tech paint that actually cools when exposed to sunlight can provide a better way to chill buildings--and perhaps even solve the long-standing problem of cooling things in space. The technology is based on the counterintuitive principle of laser cooling--using laser light to cool specially designed materials by up to 150°C. It works because molecules in these materials absorb photons while spontaneously emitting higher-energy photons. Since this loses energy overall, the temperature falls. Mounting lasers on people's roof wouldn't be very practical, though, so Yaron Shenhav wanted to make the material work with sunlight.
