Assertion: microscope's image | /r/HasProperty | upright
Facets:
Source sentences:
text: Unlike the compound microscope in a stereo microscope, the image is upright and not upside down and backward.
text: For virtual images, M {\textstyle M} is positive and the image is upright.
text: In this case, the image is virtual and inverted, which cannot happen for a single element (case 2 and case 3 images for single elements are virtual and upright).