Assertion: short wavelength radio wave | /r/ObjectUse | used for long distance communication
Facets:
Source sentences:
text: Medium wavelength radio waves are reflected from the ionosphere, a layer of charged particles in the upper atmosphere, so they can be used for long distance communication.
text: Medium wavelength radio waves are reflected from the ionosphere, a layer of charged particles in the upper atmosphere, so they can be used for long distance communication.