Assertion: microscope's light | /r/HasProperty | shifted
Facets:
value: by −90°
type: OTHER
value: typically
type: DEGREE
Source sentences:
text: When observing an unstained biological specimen, the scattered light is weak and typically phase-shifted by −90° (due to both the typical thickness of specimens and the refractive index difference between biological tissue and the surrounding medium) relative to the background light.