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Int 1 Physics Mindmap

Revision for Intermediate 1 Physics

Ross Ritchie

on 15 December 2010

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Transcript of Int 1 Physics Mindmap

Intermediate 1 Physics Telecommunications Radio signals are waves that transfer energy 300 million meters per second No wires Ariel Tuner Decoder Amplifier Loudspeaker Receives Signals Selects a channel Converts the channel to an electrical signal Makes the signal stronger Converts the electrical energy to sound energy Frequency is the number of waves in one second This is measured in Hertz (Hz) Stations are identified by their frequency TV signals are like radio signals but with a higher frequency Recieves the signal Selects a channel removes the video signal from the carrier wave removes the audio signal from the carrier wave provides extra energy for the amplifiers, picture tube and loudspeaker increases the strength of the video signal increases the strength of the audio signal converts the video signal to light energy converts the audio signal to sound energy All colours on television are made up by mixing red green and blue light Satellites transmit signals to each other and to and from the ground Geostationary satellites always stay at the same position above the earth The curved dish makes the signals stronger by focusing the signals on one place Light reflects off a mirror. The angle of incidence is the same as the angle of reflection Fibre Optic cables are strands of glass
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