presentation on the uses of radio waves outside of broadcasting

1. RADIO WAVES
By jon scothern

2. INTRODUCTION
During this presentation I will cover:
 What are radio waves
 Radio wave spectrum
 Different applications of radio waves

3. WHAT ARE RADIO WAVES?
Radio waves are a form of electromagnetic radiation. that varies in
wavelength from around a millimeter to 100,000 km, and has one of
the widest ranges in the electromagnetic spectrum. like all other
electromagnetic waves, they travel at the speed of light. Radio waves
can occur both Naturally and man made.

4. E L E C T RO M AG N E T I C S P E C T RU M

5. R A D I O WAV E I M P L E M E N TAT I O N S
 Wifi
 Radio controlled toys
 Radar
 Tv broadcasts
 Radio telescopes
 MRI and other medical uses
 Bluetooth

6. MOBILE PHONES
Mobile phones use radio waves in order to transmit information, such as phone calls and SMS messages
as well as using mobile internet
frequency range: 824.040 - 848.970 MHz.
Mobile phones also use Wi-Fi technology and Bluetooth.
Bluetooth is a proprietary wireless technology for creating personal area networks used to share data
between two devices over short distances usually under 10ft. (using short wavelength radio transmissions
in the ISM band from 2400-2480 MHz)

7. WIFI
 Transmit at frequencies of 2.4 GHz or 5 Ghz which is higher than the frequencies used other
wireless technologies like mobile phones, walkie-talkies and televisions this is so the waves can carry
more data.
 Wi-fi uses antennas around which wi-fi "hotspots" are created. The hotspots are outlets equipped to
receive the radio waves that power wireless networking. Until recently, wi-fi has been confined to more
than 10,000 hot-spots in cafes, bars and airport lounges. But various projects are under way to set up
city-wide zones,
 Mobile phones have wi-fi chips installed. This means conventional networks can be bypassed and
inexpensive long-distance calls made over the Voip (voice over ip)

8. MRI
MRI stands for magnetic resonance imaging scan is a radiology technique that uses magnetism, radio
waves, and a computer to produce in depth images of the body's internal structures.
When the nuclei of hydrogen atoms/-single protons are caught suddenly in a strong magnetic field, they
tend to line up. If the protons are then hit with a short, precisely tuned burst of radio waves, they will
momentarily flip around. Then, in the process of returning to their original orientation, they resound
with a brief radio signal of their own. Which is then processed by a computer to create the detailed
images.

9. CONCLUSION
Radio waves are becoming used more and more in modern technology with improvements continually
being made in all aspects of radio communications and technology and I do see the technology being
used for the for seeable future. However I do think that this will evolve into other areas of the magnetic
spectrum making radio waves redundant. For example digital signals overtaking broadcasting with both
tv and radio, and with the implementation of technology of things like witricity ( electricity through the
air using magnetic waves), I do believe the future dose rest upon the adaptation of other forms of the
electromagnetic spectrum. Whether or not radio waves will be around forever is still to be seen however
for the for seeable future they will be a commonplace feature in our society

10. BIBLIOGRAPHY
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January 2012].
 Radio astronomy - Wikipedia, the free encyclopedia. 2012. Radio astronomy - Wikipedia, the free
encyclopedia. [ONLINE] Available at: http://en.wikipedia.org/wiki/Radio_astronomy.
 The Electromagnetic Spectrum: Radio waves. 2012. The Electromagnetic Spectrum: Radio waves.
[ONLINE] Available at: http://www.darvill.clara.net/emag/emagradio.htm. [Accessed 30 January 2012].
 The Many Uses Of Radio Waves. 2012. The Many Uses Of Radio Waves. [ONLINE] Available at:
http://www.essortment.com/many-uses-radio-waves-58203.html. [Accessed 30 January 2012]
 BBC NEWS | Technology | Q&A: Wi-fi explained. 2012. BBC NEWS | Technology | Q&A: Wi-fi
explained. [ONLINE] Available at: http://news.bbc.co.uk/1/hi/technology/4758722.stm. [Accessed 30
January 2012]