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Radio waves by Ryan
 

Radio waves by Ryan

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This is a presentation I made for TECH1002.

This is a presentation I made for TECH1002.

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    Radio waves by Ryan Radio waves by Ryan Presentation Transcript

    • A presentation by Ryan Aidan Onions p11269227
    • 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.
    •  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.
    •  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
    •  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.
    •  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.
    •  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.
    •  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.
    •  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.
    •  How Stuff Works “What Is Wi-Fi” http://computer.howstuffworks.com/wireless- network1.htm Accessed: 27th January 2012 How Stuff Works “How Radio Works” http://www.howstuffworks.com/radio.htm Accessed: 27th January 2012 BBC Learning Zone, Radio Waves and MRI http://www.bbc.co.uk/learningzone/clips/radio -waves-and-mri-scans-the-electromagnetic- spectrum/1457.html Acessed 27th January 2012