Assertion: fiber optic cable's glass | /r/HasProperty | pure silicon dioxide
Facets:
value: extremely
type: DEGREE
Source sentences:
text: The glass used in the core is extremely pure silicon dioxide (SiO2), a material so clear that you could look through 5 miles of it as though you were looking through a household window.
text: The glass is incredibly pure so that, even though it is several miles long, light can still make it through (imagine glass so transparent that a window several miles thick still looks clear).
text: The glass used in the core is extremely pure silicon dioxide (SiO2), a material so clear that you could look through 5 miles of it as though you were looking through a household window.