Surface of rough glass magnified to 20 micrometers.

Glass Defects

Close up view of glass that has a rough surface.  This photo covers an area of about 20 micrometers.  A typical bacterium is 1 to 10 micrometers in length.  A strand of a spiders web silk is about 3 to 8 micrometers in thickness.  As you can see, some glass surfaces are rough; microscopically they …

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