임의 구분전파전자통신기능사 · 2023년03월11일 · 16/60
16.다음 중 "Radio Waves"를 가장 적절하게 설명한 것은?
1
General term applied to the use of electromagnetic waves.
2
Radio determination based on the reception of the direction of a station object.
3
Any radiocommunication other than space radio astronomy station
4
Electromagnetic waves of frequencies arbitrarily lower than 3,000[GHz], propagated in space without artificial guide.정답