SCIMAT / SCIENCE PHOTO LIBRARY SCIMAT / SCIENCE PHOTO LIBRARY
Three consecutive sections (15 mm each, only a part of them is shown) of a natural (uncleaned) porcupine hair by SEM show how the hair becomes gradually thinner. The thickness (diameter) of the hair sections is reduced from 170 to 104 micrometers in the middle from the bottom to the top hair sections. Enhanced SEM. Image width: 1.28 mm. Magnification: 78x if the image is printed 10 cm wide.
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