Assertion: radar | /r/HasProperty | radio
Facets:
Source sentences:
text: This means that a solid object in air or in a vacuum, or a significant change in atomic density between the object and what is surrounding it, will usually scatter radar (radio) waves from its surface.
text: Radar ( for "RAdio Detection And Ranging"), is a radio sensor, generally (but not always) operating in the microwave frequency range (> 1 GHz), and is an ACTIVE sensor.