The radio waves come to a focus not at a point but along a line.
And the key to being small was to use short radio waves.
He was the first man who discovered radio waves in 1888.
But they had never picked up a single radio wave.
Find out all about the thousands of different uses for radio waves.
Radio waves are affected by just about everything around us.
They might as well have been asked to detect radio waves.
They use the radio waves to talk, but the signals don't come from them.
Other transmission media like radio waves or light were also used.
This year, the police and fire services will be removed from their radio waves.
