Assertion: light's wavelength | /r/CapableOf | occupy narrow band
Facets:
value: within that broad spectrum
type: LOCATION
value: very
type: DEGREE
Source sentences:
text: Within that broad spectrum the wavelengths visible to humans occupy a very narrow band, from about 700 nanometres (nm; billionths of a metre) for red light down to about 400 nm for violet light.