Assertion: ultraviolet's wavelength | /r/ObjectUse | used in communication
Facets:
value: in mines
type: LOCATION
value: between submarines
type: LOCATION
Source sentences:
text: (λ=100,000km to 10km) - these wavelengths are used in communication with, and between submarines because the waves travel through water easily.
text: These wavelengths are also used in communications in mines.