Assertion: telescope's surface | /r/HasProperty | smooth
Facets:
value: to roughly 25 micrometers
type: OTHER
value: within a millimeter
type: OTHER
value: extremely
type: DEGREE
Source sentences:
text: Because the light is passing through the lens, the surface of the lens has to be extremely smooth.
text: The surface of a dish at the Australia Telescope Compact Array is smooth to within a millimeter or so rather than the surface of a glass mirror that is normally a thousand times smoother.
text: The surface of the telescope mirror is smooth down to roughly 25 micrometers (one thousandth of an inch), which allows sub-millimeter wavelength observations.