Assertion: microscope's eyepiece | /r/HasProperty | viewed in front of a bright light source
Facets:
Source sentences:
text: Compensating eyepieces can be identified by the color fringe appearing around the inside edge of the fixed diaphragm when the eyepiece is viewed in front of a bright light source (ordinary eyepieces display a blue fringe, while compensating eyepieces exhibit a yellow, orange, or blue fringe).