2. • Radio waves are a type of electromagnetic radiation with
wavelengths in the electromagnetic spectrum longer than
infrared light. - Wikipedia
What are Radio Waves?
3. • This is a diagram of the process between the transmission and
reception of a radio wave. As you can see the sound original sound
created is passed though a microphone which sends the sound waves
to an antenna. These sound waves are changed through AM and FM.
The receiving antenna tunes the sound and passes the original sound
out through a speaker.
How do Radio Waves work?
4. Carbon Monoxide (CO) gases in our Milky Way galaxy.
• In 1932 it was discovered that many astronomical objects let out radio
waves. Astronomers then developed high tech systems that allow them
to make pictures from the radio waves emitted by astronomical objects.
• Radio telescopes look up far into the sky at planets and comets, giant
clouds of gas and dust, and stars and galaxies. Astronomers can now
learn more about the composition, structure and motion of the sky by
studying the radio waves they encounter.
What do Radio Waves
show us?
5. • Radio waves, television waves, microwaves and X Rays
are all types of electromagnetic waves. They differ from
each other in wavelength. - NASA
Different Waves?
6. • A mobile phone sends and receives all kinds of information. Radio
frequency signals are transmitted from the phone to the nearest base
station and incoming signals such as voice or text are sent from the
base station to the phone at a slightly different frequency.
• Once the signal reaches a base station it can be transmitted by higher
frequency radio links between an antenna at the base station and
another at a terminal connected to the main telephone network. This
is how handsets work.
Mobile Phone Waves?
7. • X-rays are very high frequency waves, and carry a lot of energy.
They are given off by stars. An X-ray machine works by firing a
beam of electrons at a "target". If we fire the electrons with enough
energy, X-rays will be produced. This X Rays allow doctors to see
inside people. They pass easily through soft tissues, but not so easily
through bones. We send a beam of X-Rays through the patient and
onto a piece of film.
X Ray Waves?
8. • NASA. (March 27, 2007 ). Electromagnetic Waves have different wavelengths .
Available: http://science.hq.nasa.gov/kids/imagers/ems/waves3.html. Last accessed
29/01/2012.
• Wikipedia. (26 January 2012 ). Radio Waves. Available:
http://en.wikipedia.org/wiki/Radio_waves. Last accessed 29/01/2012.
• Wikipedia. (2005). File:Radio transmition diagram en.png. Available:
http://en.wikipedia.org/wiki/File:Radio_transmition_diagram_en.png. Last accessed
29/01/2012.
• Radiocommunications Agency. (2001). Mobile Phone Base Stations - How Mobile
Phone Networks Work . Available:
http://www.ofcom.org.uk/static/archive/ra/topics/mpsafety/school-
audit/mobilework.htm. Last accessed 29/01/2012.
• Andy Darvill. (). X Rays. Available: http://www.darvill.clara.net/emag/emagxray.htm.
Last accessed 29/12/2012.
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