Fibre Optics

 

 
Activity.... Do – Think - Learn
Light can travel along thin strands of glass or plastic (optical fibres) even when they are twisted. 
What will you have to do to produce as square of light? 
How does fibre optics enable light to travel?
 
 
The Science Bit
 
Fibre optic cables are bundles of transparent glass threads that transmit messages by light. A thin layer of glass, called cladding, surrounds each fibre and stops light from escaping. The cladding reflects all the light back into the fibre so that it bends round the fibre. This is called total internal reflection. There are many use of fibre optics, underwater, medicine, communications and so on.
 
Curriculum
Light and Dark
  • That there are many sources of light
  • That light sources vary in brightness
  • To observe and make comparisons of sources of light
Light and Shadows
  • Transparent objects/materials let a lot of light through
How we see things
  • That light travels from a source
  • To use their knowledge about light to explain observations
 
 
Last Modified: 27/07/2011