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 ...

Radio waves are used for sending radio and television signals. They are also used to control radio-controlled toys, like cars, boats and aeroplanes. We even use radio waves in astronomy ...

Meteorologists use radar to track a storm. A pulse of radar is reflected by the storm and returns to the receiver after 3 ms. Time for the radio waves to travel to the storm and back = 3 ms ...