Assertion: radio wave | /r/CapableOf | hit the earth surface
Facets:
value: because of the differing heights of refraction
type: CAUSE
value: because of apparent reflection
type: CAUSE
value: at different points
type: TEMPORAL
Source sentences:
text: Because of the differing heights of refraction, or apparent reflection, the radio waves hit the earth surface at different points hence generating the skip distance.