Radio waves by Ryan


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This is a presentation I made for TECH1002.

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Radio waves by Ryan

  1. 1. A presentation by Ryan Aidan Onions p11269227
  2. 2. The question on all our lips!Well here are the answers you seek: Radio waves are part of the electromagnetic spectrum (along with Gamma Rays, X-Rays, UV light, Visible light, Infer-red and microwaves.) Fun fact: Radio waves are a lower frequency than microwaves and surround us, but fortunately they don‟t cook us, instead they pass right though solid matter and are pretty useful in long distance communication.
  3. 3.  I know you are all wondering about where Radio waves fit into this „electromagnetic spectrum.‟ You will be pleased to know I have answers! The diagram below shows us that it is a large part of the electromagnetic spectrum and contains AM and FM radio waves.
  4. 4.  Radio is probably the most obvious answer but not the only use for radio waves. Other uses include: Mobile Phones Bluetooth Wireless Networks Television Broadcasts GPS receivers Satellite communication (including the internet) Police Scanners
  5. 5.  The radio was one of the first human inventions to utilise radio waves in the form of one-way commutation. Two types of radio: Amplitude Modulation (AM) and the more popular Frequency Modulation (FM) It works by an antenna sending out the radio waves which are picked up by your radio, the signal is then converted into sound and played out of your speakers.
  6. 6.  Wireless networks are a very important part of the modern world today. Wireless networks have recently become very common over the past decade and can be found almost anywhere.  Many businesses (including Starbucks and Wetherspoons) offer free Wi-Fi within their establishment. These networks give the consumer the ability to access the internet without and cables. I wonder why they call it wireless.It works like two way radio communication.A computer‟s wireless adapter will changedata into a radio signal and transmit it toand antenna. A wireless router will thenreceive this this information, decode it andsend it off to the internet using a wiredEthernet connection.
  7. 7.  In terms of Radio Waves, Wi-Fi operates at 2.4GHz or 5GHz which is a very high frequency more commonly used for mobile phones and television. The frequency is so high as it allows for more data to be carried.
  8. 8.  Radio waves are used in Magnetic Resonance Imaging and is able to visually map out the insides of the human body in 3D. It is used particularly to see the brain and check for tumours. A very important part of modern medical procedures. Proof that Radio Waves are not all about soaps on TV and Chris Moyles and can actually saves human lives.
  9. 9.  In today‟s society Radio Waves have become very important. Whether that‟s to listen your favourite show on AM radio or keep your inner hypochondriac at bay and have your week MRI scan. I personally believe we‟ve arrived at a place where we cannot live without Radio Waves. From the extremely useful police scanners keeping us safe to the unnecessarily useful wireless car door locks that keep us lazy.
  10. 10.  How Stuff Works “What Is Wi-Fi” network1.htm Accessed: 27th January 2012 How Stuff Works “How Radio Works” Accessed: 27th January 2012 BBC Learning Zone, Radio Waves and MRI -waves-and-mri-scans-the-electromagnetic- spectrum/1457.html Acessed 27th January 2012