Presentation on radio waves used in media technology

1. Name: Sheraz Hussain
Student Number: P11235672
Module: TECH1002

2. Radio Waves are seen as a type of electromagnetic
radiation. This type of radiation has long
wavelengths, with frequencies ranging from 3
kHz to 300 GHz. The wavelengths can be as
long as 100 kilometres.
Radio waves are used for many things such as
communication devices like mobile phones and
broadcasting devices such as televisions.

3. Radio waves have the lowest frequencies in the electromagnetic
spectrum. They are also only mainly used as a means of
communication. High frequency electromagnetic waves include
x-rays and gamma rays.
AM Radio has a lower frequency than FM.

4.  Television is a media source which allows us to
transmit and receive moving images and sound.
 The way in which this is done is through video
and sound signals transmitted through the air.
These signals can be picked up by using an
antenna which help use as much as the signal and
perhaps amplify it.
 ‘Sky’ the television broadcasting company use a
similar method in which they use a satellite dish to
receive signals which are sent to the television
through a cable.

5.  To communicate using a mobile phone you need to
have a network. Mobile networks are used to
transmit signals from a mobile phone to a base
station.
 These signals carry data such as text messages and
calls back and forth from and to the base
station, by converting it into radio waves.
 Mobile phones also have access to the
internet, which requires radio waves.
 A base station is normally close by, within a few
miles. Depending on where you live, you should
receive a decent network coverage because of the
overall network coverage in a geographical area.

6.  Wi-Fi is short for Wireless networking
 It lets electronic devices to exchange data through
a computer network, wirelessly.
 Devices with Wi-Fi
include Personal
Computers, Gaming
consoles, Smart phones
and many more.
 Main network resource is the
internet, and it can connect
with this through a wireless
network access point.

7.  Wi-Fi uses radio waves like mobile phones and
creates a zone called WLAN(Wireless Local Area
Network.
 Using an internet connection, a Wireless
Transmitter device converts the data into a radio
signal and sends it.
 The transmitter can be seen as a broadcasting
signals it gets from the internet.
 These transmissions are sent to the Wi-Fi enabled
device, such as a laptop and receives the radio
signal through a wireless adaptor. These radio
signals are important as they carry the data from
the router and adaptor and make it wireless.

8.  Overall Radio waves are an important element
in media technology, and not just in AM and
FM Radio. They allow for many mediums of
media to work efficiently.
 Their are many mediums of media old and
new which rely on these radio waves to be
transmitted from one place to another. Old
mediums of media such as television
broadcasting use radio waves as well as new
technology such as Wi-Fi and rely on it just as
much.

9.  Andy Darvill. The Electromagnetic Spectrum. What is the
electromagnetic spectrum?[online] Available at:
<http://www.darvill.clara.net/emag/index.htm >
[Accessed 20 January 2012 ]
 Tech-FAQ. How television broadcasting works [online] Available at:
< http://www.tech-faq.com/how-television-broadcasting-works.html>
[Accessed 20 January 2012]
 O2. How mobile networks work. [online] Available at:
< http://www.o2.com/cr/how_mobile_networks_work.asp>
[Accessed 20 January 2012]
 BBC Webwise. What is Wi-Fi? [online] Available at:
< http://www.bbc.co.uk/webwise/guides/about-wifi>
[Accessed 21 January 2012]