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The polarizing microscope is a specialized optical instrument extensively used in crystallography, mineralogy, and economic geology for the identification and study of minerals in thin sections. It is designed to examine anisotropic properties of crystalline substances by using polarized light and consists of several distinct optical and mechanical parts arranged in a precise sequence. The source of illumination is usually a built-in electric lamp located at the base of the microscope. Light from the source passes through a collector lens and then through the _________ ______ ______ ___ ______ ___ ____ _____ ______.
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