Thermal radiation: Usually it depens only on the temperature (coal on the left), But with topological tricks, it is possible to make a surface emit thermal radiation only at certain points, so that a ...

Using a phenomenon called "negative light," scientists invisibly transferred data disguised as background thermal radiation.

Radiation is energy that moves from one place to another in a form that can be described as waves or particles. We are exposed to radiation in our everyday life. Some of the most familiar sources of ...