Wonder how emails, faxes and internet messages are transmitted? It's not over air or via satellite but rather through the use of optic fibre. Optic fibre make use of reflection of light rays to transmit messages. For more information, read this:
http://www.connected-earth.com/LearningCentre/Museumprojectssecondary/Goonhillyscienceproject/MuseprojSec_G_HFoundationWorkSheet3.pdf
There are some research questions at the bottom of the page. You can do this in pairs and share with us your answers when class reopens.
Marina
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