We have learnt the use of satellites in Unit 1. However, we were confused about using public phones to contact our friend located at another part of the same country. Actually, if we are calling our friends within the country, our phones are linked to telephones lines and cables. Satellites are not used here.
When we travel to Malaysia, our mobile phones will have the 'auto-roaming' service. Yes, our mobile phones act as satellites phones.
Find out more about how telephone works and how satellite phones works.PS: Look out for the interesting animation.
http://communication.howstuffworks.com/telephone2.htm
http://www.highspeedsat.com/satellite-phone-how.htm
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I was impressed with the GPS, the device that makes use of the satellite to locate the position of our family vehicle. It helps me to get from one location to another location last weekend. I learn to love Science more as it is Science and technology that allow us to enjoy such convenience.
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