The basic design of the radio antenna hasn’t changed in a century. The antenna is usually a set of metal rods roughly half the size of the wavelength they are designed to receive. The electric field ...

Radio waves, longer and less energetic than visible light, give astronomers access to some of the most obscure physics in the cosmos. If you ask an astronomer to choose the single most exciting ...

There is more to light than meets the eye, and it teaches us a lot about the universe. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Parts of ...