PHILIPPE PSAILA / SCIENCE PHOTO LIBRARY PHILIPPE PSAILA / SCIENCE PHOTO LIBRARY
Fibre optics quality control. Technician using a light microscope to examine optical fibres. The screen (lower centre) shows what he is seeing. The fibre optic cable runs from the microscope down to his right hand, and is the vertical strip seen on the screen. Fibre optics cables use total internal reflection of light to transmit information. This technician works for the French company Alcatel.
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