Standing waves are one of those topics that lots of people have a working knowledge of, but few seem to really grasp. A Ham radio operator will tell you all about the standing wave ratio (SWR ...

AMONG the facts to be explained in a satisfactory theory of the propagation of radio waves over the earth's surface are the curvature of the rays in transmission between stations far apart ...

The systematic investigation of the properties and characteristics of these very short waves was taken up in view of the advantages which they seemed to offer in the field of practical radio ...

The first steps toward inventing radio involved discovering electromagnetic waves and their potential. Hans Christian Oersted was the first to proclaim, in 1820, that a magnetic field is created ...

He designed a transmitter to send and a receiver to detect radio waves. By the end of the century Marconi had managed to send signals over several miles with no wires, and the idea was taking hold ...

At hypersonic speeds, complexities occur when the gases interact with the surface of the vehicle, such as boundary layers and shock waves ... for the first time in 3D. The study, "Loss of axial ...

or magnetic resonance imaging (MRI), which creates images with the use of magnetic fields and radio waves. While these tests are more detailed than the 2D or 3D mammogram, they may not be covered ...