1. THE USE OF RADIO WAVES
By Joseph
AND SIGNALS BEYOND Thomas
BROADCASTING

2. WHAT ARE RADIO WAVES ?
 Radio waves are electromagnetic radiation within an invisible
form that dif fers 100,00km to a millimetre in terms of
wavelength. It is one of the broadest assortments in
the electromagnetic spectrum.
 Audio, images, and text in the form of signals are just some of
the capabilities of the ‘Radio’. Both Nikola Tesla and
Guglielmo Marconi Nikola Tesla are credited with being some
of the first innovators in the expanse of radio.
 Frequency refers to how long the measured time is between
the crest and trough of a wave arriving at the source. The
frequency is in the 450 -750 terahertz range in visible
light, meaning 450-750 crests and troughs pass through a
detector in a single second of waves .

3. ELECTRO MAGNETIC SPECTRUM
 The image below is the electromagnetic spectrum , as you can
see the radio has the least amount of energy , but the highest
increase of wavelength.

4. THE DIFFERENCE'S IN ‘AM’ AND ‘FM’
 Both AM and FM are two methods for delivering embedded in a
carrier frequency and signals.
 ‘AM’ is short for ‘amplitude modulation’. In this technique, the
amplitude or height of the carrier signal increases and decreases
as the base signal changes. AM radio signals travel great
distances so that a single transmitter can cover over large
areas.
 ‘FM’ is short for ‘Frequency Modulation’ . The frequency of the
carrier signal increases and decreases in order to represent the
change in voltage of the overall base signal. ‘FM’ signals offer
better signal quality than ‘AM’ but have far less range, this leads
to demanding multiple transmitters to cover the same area as it
would take to cover one transmitter for ‘AM’.

5. THE USES OF RADIO WAVES
 These are just some of the main uses of radio waves today
, some of them we use on a daily basis .
 Mobile Phones
 Radio
 Microwaves
 Radars
 Walky -talky
 Wi-Fi

6. WI-FI
 Wi-Fi is short for Wireless networking, many people use
wireless networking, also known as 802.11 networking, to
connect their computers within their own home, and even
some cities are trying to use the technology in order to
provide low -cost Internet access to citizens. In the near
future, wireless networking may become so extensive that you
can access the Internet just about anywhere at any time.
 Wi-Fi has a number of dif ferent advantages. Wireless
networks are informal to set up and inexpensive. They're also
discreet -- unless you're on the lookout for a place to use your
specific laptop , and wire – free !

7. MICROWAVES
 M-icrowave oven uses radio waves in order to heat specific
foods. In the case of microwave ovens, the commonly used
radio wave frequency is roughly 2.5 gigahertz .
 within this frequency range , radio waves have an interesting
property, they are absorbed by sugar, water and fats. When
absorbed they are converted into atomic motion -- heat.

8. REFRENCES
 http://www.wisegeek.com/what -are-radio-waves.htm
 http://wiki.answers.com/Q/Difference_between_am_and_FM_
waves
 http://www.howstuffworks.com/wireless -network.htm