One of the newer uses for radio waves, but quickly became a prominent one. Wi-Fi is used in most homes and a lot of good coffee shops/restaurants/ pubs etc.
Because of radio waves managing to cover long distances and the internet becoming the most useful resource commercially available Wi-Fi is an important way to communicate/work on the go. Wi-Fi's frequency varies between 2.4 GHz and 5GHz and wavelength varies depending on the power of the device.
Some business offer free wireless, such as Wetherspoons, National Express, McDonalds, but others see it as a money making opportunity such as Starbucks and BT.
What else is it used for?
Radio waves doesn't just have communication and entertainment uses, it expand into safety, medical and detection purposes, to name a few.
For example, police scanners and MRI machines.
While some radio signals can be turned off or changed, such as AM/FM radio or what you receive via your TV set, there are still thousands of radio waves darting past you, this could be in the form of police scanners.
MRI (Magnetic Resonance Imaging) produce internal images it is used in medicine to find problems such as cancer, broken bones and more.
Radio waves in Astronomy
Humans possess this lust for knowledge which is the main catalyst behind any major development in history. One of the more perplexing things is space and the development of radio waves have helped Astronomy as well.
On the electromagnetic spectrum you'll notice visible light is mention, this is everything that we can see, if you look up to the sky, you can see the stars and if you're really lucky a planet or two, however, the used of radio waves help us to look further.
Using radio astronomy scientists can search for celestial objects that give off radio waves that would otherwise be invisible.
Other bits of information about Radio waves
Natural radio waves are created by things like lightning and astronomical objects, this means that most radio waves are man-made and have been created for the purposes in which they are used.
Radio waves, like everything else on the electromagnetic spectrum travels at the speed of light, this is the reason we cannot see the radio waves, they are simply travelling too fast to comprehend with the naked eye.
Long waves can travel the earth quite consistantly, but shorter waves may reflect of the earth’s ionosphere and travel the world easily.
Radio waves are commonplace everyday, thousands of radio waves are flying past you and I at this very moment.
Radio waves are used for all purposes, including entertainment, communication, medical, safety, discovery and so much.
Radio waves can have varying wavelengths and frequencies. Radio waves are at the end of the electro magnetic spectrum, after microwaves.
Radio waves travel too fast for people to see. Not only are they invisible but they are silent too.
Curiosity.com, 2011 Importance of Radio Waves [online] Available at http://curiosity.discovery.com/question/what-importance-of-radio-waves [accessed 29/01/12]
About.com, 2012 The Invention of Radio [online] Available at: http://inventors.about.com/od/rstartinventions/a/radio.htm
Wikipedia.com, 2012 Radio Frequency [online] Available at: http://en.wikipedia.org/wiki/Radio_frequency [accessed 29/01/12]