Assertion: radio wave | /r/CapableOf | travel through vacuum
Facets:
value: at the speed of light
type: MANNER
Source sentences:
text: Radio waves are electromagnetic waves that can travel through a vacuum.
text: Radio waves travel through a vacuum at the speed of light, and in air at very close to the speed of light, so the wavelength of a radio wave, the distance in meters between adjacent crests of the wave, is inversely proportional to its frequency.