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Grain boundaries can be observed when viewing a polished metal under a microscope as they are lower energy areas of the metal and adsorb more of the light from the microscope. / Korrelgrense kan waargeneem word wanneer 'n gepoleerde metaal onder 'n mikroskoop bekyk word, aangesien dit gebiede van laer energie van die metaal is en meer van die lig van die miksroskoop absorbeer.
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