If an extraterrestrial civilization existed with technology comparable to ours, would they be able to detect Earth?

Sending electromagnetic waves into the air. In 1894, Marconi transmitted the first radio waves. The first commercial radio station to transmit audio frequencies was KDKA in Pittsburgh ...

Radio is recognised as one of the most widely consumed mediums worldwide. Here are some key facts about radio, and all you ...

Like most waves in the electromagnetic spectrum, radio waves tend to bounce off of various objects. This can be frustrating to anyone trying to use something like a GMRS or LoRa radio in a dense ...

allowing them to push data transmission into previously unused high-frequency ranges. By merging these two technologies — radio waves at lower frequencies and lasers at higher frequencies ...

The first steps toward inventing radio involved discovering electromagnetic waves and their potential ... that by sending the first long-distance transmission of human voice and music from ...

As a technology to achieve 400-Mbps-class wireless transmission, we are researching a scheme using millimeter waves in the 42-GHz band, which enables large-capacity transmission with a wide ...

At double the width of our Milky Way galaxy, this jet of radio waves is the biggest ever detected so early in the history of the universe, astronomers reported Thursday. Radio jets like this are ...

Information is coded into the wave before transmission, which can then be decoded when the wave is received. Television and radio systems use this principle to broadcast information. Microwaves ...