presentat

2. In this presentation I will be talking about
the different use of radio waves in
different areas of media technology
such as wifi, television, mobile phones
and computers and explaining what a
radio wave actually is and concluding
with my views on radio waves being
used in media.

3. A radio wave is an electro magnetic form of
radiation in the electromagnetic spectrum
that is longer than microwave, infrared and
ultraviolet. It generally has a longer
frequency
RADIO

4. WIFI (wireless networks) is an example of a new
type of media that uses radio waves to
transmit its signals. They transmit frequencies of
2.4Ghz or 5Ghz, but usually the higher
frequency the more data it can carry. The
way it works is-
- A computer will have an adapter that will pick
up the wireless signal and translate the data
into a radio signal which will then be sent back
to the wireless router using an antenna.
- The router will then receive the signal and
decode it and send the signal information to
the internet.

5. Television is a way of receiving moving
images and viewing them. The way it works
with radio waves is:
- The antenna on the TV receives the signal in
an electromagnetic wave and that is
broadcasted from the station of the
channel the viewer is watching, the signal is
then received and shown on the television
screen.

6. A satellite dish works in a similar way to a TV antenna-
the signals are sent from the programming source
to a satellite in space, which is then directed to the
television centre where the channel is based, and
then the signal from there is beamed again into
space where the satellite dish receives it and this is
then connected to a receiver box connected to
the television and it then shows the program.

7. - A mobile network uses radio waves to
transmit their signals to and from mobiles to
the base stations that are usually located
very close by.
- The signals also carry data and it is also
used to access the internet on phones, but
it can be quite slow because of the
interference, and 3G networks are now
being used instead because of the quicker
speeds that data can be transferred.

8. Radio waves are used in a much more wide variety of
media today than it was used in the past. Today people
use it to watch television, use mobile phones and listen
to radio more importantly, but even now these are
starting to make way for a newer generation of media
broadcasting mediums such as;
DAB radios, the digital switch over on TV and 3/4G
networks, which provide a quicker, safer and better
service than radio waves. Radio waves are starting to
become more less used and my prediction is that soon
there will be a world where everything will be digitalised
and radio waves will not exist anymore.

9. http://www.cernea.net/wp-
content/uploads/2010/09/Electromagnetic
Spectrum.png (Picture of the
electromagnetic spectrum)
http://static.ddmcdn.com/gif/satellite-tv-4.jpg
(satellite dish picture)
http://www.digitaluk.co.uk/__data/assets/ima
ge/0003/36372/digital2.png (digital switch
over man)