van der Kolk method

van der Kolk method

A test used in microscopy to determine the index of refraction of a mineral grain relative to that of an immersion liquid. When transmitted light is blocked, the grain acts as a lens and the ocular inverts the image of the obstacle, causing a shadow to appear on the same side as the obstacle when the grain has the higher refractive index, but on the opposite side when the grain has the lower index.

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Part of Speech: noun
Synonym(s): oblique_illumination_method
Blossary:
Industry/Domain: Mining
Category: General mining; Mineral mining
Government Agency: USBM
Product: Dictionary of Mining, Mineral, & Related Terms - 2nd Edition
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