But for me it was disappointing because I know it is actually possible to see what radio waves look like ... this radar to directly image a 2.4 GHz microwave field emitted from its own transmitter.

Radio waves have wavelengths ranging from thousands of metres down to around 30 cm. This means they can easily travel around large objects, like hills, mountains or buildings. Microwaves have ...

Magnetrons cause electric charges to oscillate and emit microwaves — a more powerful form of radiation than the radio waves previously used for radar defences. The post-war period saw a ...

There's lots to discover in the electromagnetic spectrum. Here's a tour that begins with radio waves and takes you through microwaves, infrared radiation, light, ultraviolet radiation, and X-rays.

It describes how a crystal set functions as a simple radio receiver and introduces microwaves as shorter electromagnetic waves. The program demonstrates properties of these waves, including ...