<microscopy> When the liquid phase of a microscopical mount has arefractive index different from that of the solid phase, a line or narrow band of light can be observed around or just within the outlines of the specimen as the microscope tube is raised or lowered from its position of best focus. The presence of the line indicates the differen...
Found on
http://www.encyclo.co.uk/local/20973
The bright line at the margin of a grain visible when viewed in thin section which can be used to determine the refractive index relative to another grain or the mounting medium.
Found on
https://www.encyclo.co.uk/local/20501
No exact match found.
