Assertion: reflecting telescope's mirror | /r/CapableOf | sag under its own weight
Facets:
value: slightly
type: DEGREE
Source sentences:
text: A mirror beyond that size would also sag slightly under its own weight as the telescope is rotated to different positions, changing the precision shape of the surface, which must be accurate to within 2 millionths of an inch (50 nm).
text: A mirror beyond that size would also sag slightly under its own weight as the telescope was rotated to different positions, changing the precision shape of the surface.