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| Researchers bend a single strand of glass fiber, approximately the size of a human hair, to test its strength. This particular fiber consists of E-glass, a common kind of reinforcement fiberglass. Photo courtesy of Ohio State University. |
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| This electron micrograph shows the cross-section of a piece of glass fiber broken during testing. Figure (c) shows a close-up of the defect that caused the break -- a single platinum-rhodium crystal -- and figure (d) shows the void left by the crystal on the other side of the break. Photo courtesy of Ohio State University. |
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