Assertion: calcium fluoride | /r/CapableOf | exhibit low change
Facets:
value: extremely
type: DEGREE
value: with wavelength
type: OTHER
value: in refractive index
type: OTHER
Source sentences:
text: In the laboratory, calcium fluoride is commonly used as a window material for both infrared and ultraviolet wavelengths, since it is transparent in these regions (about 0.15 µm to 9 µm) and exhibits an extremely low change in refractive index with wavelength.