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Delivery - immediate
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Light with a lamp or a laser pointer at one end of the wire and see the light at the other end. Try bending the cable - can you see the light?
Fibre optics are based on the total reflection of the light inside the cable. This means that light can travel long distances with relatively small energy losses. Try moving light using the cable and have a think about what you could use this technology for. May also inspire discussions on the refractive index of various media, reflection and total reflection, for example. The wire in the pack is three metres long and can easily be cut to the required length.
Material: Plastic.
Dimensions: Length 3 m, diameter 1 mm.
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