Tag Archives: cellphones

Do you have a collection of old cell phones in a desk drawer somewhere because you don’t know what to do with them? A new US initiative aims to make it easier for people to recycle phones, computers, and other battery-powered electronics. This month, the US Department of Energy announced …

The world relies on electromagnetic waves for communications: Wi-Fi, Bluetooth, 5G, even radio waves. But suppose you want to prevent a device from communicating—or interfering—with the rest of the world. You can't block EM waves, but you can cancel them by surrounding the device with an electrically conducting material. We …