The Day 'Radio Waves' Included Frequencies Below 10 kHz: Why the Lower Limit Disappeared from the Radio Act in 1965, While the 3 THz Upper Limit Remained

Legal provisions sometimes preserve society's understanding of the science and technology of their time in the form of ...

Why do TV remotes use infrared instead of radio waves? — Communication that is 'wireless' yet outside the Radio Act

TV remotes have no cords.If you press a button while sitting on the sofa, the TV a few meters away responds. In everyday ...
The Conversation

Curious Kids: can our brains sense electromagnetic waves?

Electromagnetic waves are packets of energy travelling all around us. Some of these waves have lots of energy, and some have less. We call the lowest energy electromagnetic waves radio waves. There’s ...
Phys.org

Researchers make sound waves travel in one direction only, with implications for electromagnetic wave technology

Researchers at ETH Zurich have managed to make sound waves travel only in one direction. In the future, this method could also be used in technical applications with electromagnetic waves. Water, ...