Radio Waves in Media Technology  other than radio broadcasting     Elsbeth Guthrie P1125496X     Studies in Media Technology
What are Radio Waves? Radio Waves are longest wavelengths in the electromagnetic spectrum. Radio waves range in length fro...
How do they work?  • Radio waves work by transmitting the signal to you radio, TV    or phone. The antenna of the radio is...
Radio Waves in Mobile Phones• Old phones used to have antenna’s on the top of them so they  could be used and call people ...
Radio Waves in Mobile Phones        • Mobile phones also emit a small amount of electromagnetic          radiation. Mobile...
Radio Waves In TV• Radio waves used to be used in TV when TV’s had antenna’s on  the top of them or satellite dishes on th...
Radio Waves In TV  • After the digital switchover, between years 2008 and    2012, gets rid of analogue TV and all TV’s be...
Bibliography• Radio Wave Length Picture:  http://web.princeton.edu/sites/ehs/osradtraining/radiationproperties/rad  iation...
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  • Mobile phones also emit a small amount of electromagnetic radiation. Mobile phone emit signals through radio waves, which are made up of RF or a radio frequency energy which is a type of electromagnetic radiation.
  • However for Sky TV they still use a satellite this is because there are different frequencies for this type of TV. This is because they are encrypted so you need to pay a fee to watch the channels.
  • Radio waves presentation

    1. 1. Radio Waves in Media Technology other than radio broadcasting Elsbeth Guthrie P1125496X Studies in Media Technology
    2. 2. What are Radio Waves? Radio Waves are longest wavelengths in the electromagnetic spectrum. Radio waves range in length from very small (A millimeter) to very big (100,000 km) this makes it one of the biggest ranges of waves on the electromagnetic spectrum.However they bring a lot more than just your music to your radio they canalso be used for mobile phone and TV’s and all forms of electromagneticradiation as long as the frequency is above 300 GHz and the wave is biggerthan a millimeter.
    3. 3. How do they work? • Radio waves work by transmitting the signal to you radio, TV or phone. The antenna of the radio is an important part for this process to work. The antenna picks up the signal or wave being transmitted to the radio. This is a small thin piece of wire that the transmitted wave interact with.• However the tuner is another important part for the radio waves to actually work and you get some entertainment from it. The tuner separates the sine waves from all the thousands of other waves that the antenna picks up. It then amplifies the frequency ignoring all the other frequencies so you can get what you want from your radio, TV or phone.
    4. 4. Radio Waves in Mobile Phones• Old phones used to have antenna’s on the top of them so they could be used and call people around the world from the signal being picked up through the antenna.• However, nowadays mobile phones use a cellular system instead which means it uses frequencies this is the same method as a radio transmitting sounds to an audience. Both of which use radio waves to do what they need to.• I.E. For radio it’s transmitting music to a listening audience. For mobile phone’s it could be sending an email, text or using internet.
    5. 5. Radio Waves in Mobile Phones • Mobile phones also emit a small amount of electromagnetic radiation. Mobile phone emit signals through radio waves, which are made up of RF or a radio frequency energy which is a type of electromagnetic radiation.• Because of this there is an issue about whether the radiation emitted is causing health problems or not.• People on their phones a lot and keeping it up to their ear would have the radiation near their head a lot of the time which could cause health problems. There are small short term solutions to this though; hands free, mobile phone ear pieces and ear phones and putting it too speaker.
    6. 6. Radio Waves In TV• Radio waves used to be used in TV when TV’s had antenna’s on the top of them or satellite dishes on the top of the house. The process for this is the same as for the radio and the mobile phones when they had antenna’s on them.• After technology progressed and antenna’s were taken off the television’s it became analogue TV. This broadcasts an encoded analogue audio and analogue video signal. This shows the broadcast signal on the TV which is a function of amplitude or frequency. Both of which use radio waves.
    7. 7. Radio Waves In TV • After the digital switchover, between years 2008 and 2012, gets rid of analogue TV and all TV’s became digital using free view without a satellite dish but using an aerial instead. This still uses electromagnetic spectrum.• However for Sky TV they still use a satellite this is because there are different frequencies for this type of TV. This is because they are encrypted so you need to pay a fee to watch the channels.
    8. 8. Bibliography• Radio Wave Length Picture: http://web.princeton.edu/sites/ehs/osradtraining/radiationproperties/rad iationproperties.htm• http://science.hq.nasa.gov/kids/imagers/ems/radio.html• http://www.wisegeek.com/what-are-radio-waves.htm• http://www.howstuffworks.com/radio8.htm• http://www.howstuffworks.com/cell-phone-radiation.htm• http://electronics.howstuffworks.com/cell-phone1.htm• http://www.digitaluk.co.uk/propertymanagers/carrying_out_work/technic al_information/will_relay_transmitters_transmit_digital_tv_signals_after_ switchover

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