Why is electromagnetic repulsion so infrequently used in applications? As in, using an electromagnet to repel a permanent magnet, rather than to attract a magnet or ferrous material? I was doing some ...

This hoverboard looks like the real deal - unlike the recent fake hoverboard. Although I'm not exactly sure how the Hendo Hoverboard works, I have a pretty good guess. Let's look at electromagnetic ...

Metal nanostructures can convert incident light into nanoscale confined and strongly enhanced optical fields ('hot spots'), thus acting as the optical analogue of an antenna. When molecules or ...

Forbes contributors publish independent expert analyses and insights. The Universe is out there, waiting for you to discover it. Depending on how you look at it, each force has a scale and a ...