25.5 MB (860.3 KB compressed)
3543 x 2515 pixels
30.0 x 21.3 cm ⏐ 11.8 x 8.4 in (300dpi)
PHILIPPE PLAILLY / SCIENCE PHOTO LIBRARY PHILIPPE PLAILLY / SCIENCE PHOTO LIBRARY
Testing an optical fibre cable: a whole circular drum wound with an optical fibre cable is illuminated by the green light transmitted along the cable. At right, a technician is examining a section of a cable through a light microscope.
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