Assertion: mirror's reflection | /r/HasProperty | a 180-degree difference
Facets:
value: in phase shift
type: TEMPORAL
Source sentences:
text: The reflections from the low-index layers have exactly half a wavelength in path length difference, but there is a 180-degree difference in phase shift at a low-to-high index boundary, compared to a high-to-low index boundary, which means that these reflections are also in phase.