P11251778 Other uses of radio waves.

1. By Alex Richardson
P11251778

2.  Thispresentation will include a wide
spectrum of the many opportunities
provided by radio waves.
 Wider use of radio waves, beyond radio
broadcasting.
 Their impact on society.
 Less obvious uses of radio waves.

3.  Radio waves lie on the electromagnetic spectrum and
are a very low frequency (roughly 30 KHz to 100 GHz)
and over time has become integral to the running of our
modern day society.

4.  Besides broadcasting radio waves still have a lot of other uses, they can
transmit both images, audio and text which enabled the first real
complex long distance communication.
 When first discovered in 1896 the capabilities of radio waves were not
instantly recognised however it did not take long them to be discovered,
with the first audio being broadcast in early 1900s courtesy of Nikolas
Tesla
Examples of innovations over the years;
 MRI Scanners send radio waves to provide an in-depth look behind the
flesh
 Mobile Telephones
 Radio communications e.g between emergency services.
 Cordless telephones where a massive success replacing almost all
wired telephones in a very short space of time

5.  More serious uses were also adapted for more entertaining
purposes.
 RC toys (Radio Controlled) enabled children a completely different
type of toy, putting them in the driving seat.

6. A lot of wireless technology has branched
from Radio technology:
 Door opening remotes
 Wireless networking
 Wireless/cordless phones
 Wireless printing
These developments have changed society
through the creative use of Radio
Technology.

7.  A ‘Walkie Talkie’ was the nickname given to a handheld transceiver.
It was initially created during World War II and provided an
advantage to the allies.
 The technology enabled medium distance voice communications
ideal for battlefield planning and discussion.
 Donald L. Hings created the war time device.
How does it work?
 Similar to standard radio broadcasting they transmit on a frequency
from an antenna. This then means that anyone on the same
frequency channel can listen. Echoing the one to Many broadcasts
but on a micro scale.

8.  Stands for Radio detection and ranging
 Another discovery that aided war was the Radar.
 Radar allows detection of presence of an object
at a distance as well as the speed.
 Both the frequency and wavelengths greatly
vary.

9.  Probably one of the most obvious uses of radio waves - mobile
phones have revolutionised mobile communication.
How do they work?
 Mobile phones work in a ‘cellular’ pattern hence the American term
‘cell’ phone. Various areas are split up into cells.
 Transmitters are key to mobile communications – a small low power
transmitter is fitted into the phone which connects to the base
stations for that area or ‘cell’.

10. Though advances in radio have brought about incredible inventions
there are still some problems associated with the use of Radio
Waves:
 Large Doses are thought to cause both Cancer and Leukaemia
 Some people claim that regular exposure to a low frequency field
near their homes has affected their health.
 Some people fear the new wireless age with almost constant
connections to WiFi can lead to health risks however according to
the following article these are unproven:
 http://news.bbc.co.uk/1/hi/technology/6676129.stm

11.  Toconclude radio waves discovery has
revolutionised many forms of every day life be it
medical, communication or just increasing the
ease of living.

12.  How Do Walkie Talkies Work? | eHow.com. 2012. How Do Walkie Talkies Work? | eHow.com. [ONLINE] Available
at: http://www.ehow.com/how-does_4897222_walkie-talkies-work.html. [Accessed 23 January 2012].
 HowStuffWorks "How Radar Works". 2012. HowStuffWorks "How Radar Works". [ONLINE] Available
at: http://science.howstuffworks.com/radar.htm. [Accessed 23 January 2012]
 Don Hings. 2012. Don Hings. [ONLINE] Available at: http://dlhings.ca/dlh.html. [Accessed 24 January 2012]
 The Electromagnetic Spectrum: Radio waves. 2012. The Electromagnetic Spectrum: Radio waves. [ONLINE] Available
at: http://www.darvill.clara.net/emag/emagradio.htm. [Accessed 24 January 2012].
 WiFi Health Fears ‘unproven’. 2012. BBC NEWS. [ONLINE] Available at http://news.bbc.co.uk/1/hi/technology/6676129.stm.
[Accessed 24 January 2012].