Which of the following term is most improper? 상세 페이지
1[전파전자통신기사 필기] 16년 1회차
Which of the following term is most improper?
1
Radio - A general term applied to the use of radio waves
2
Communication - Telecommunication by means of radio waves
3
Waves or hertzian waves - Electromagnetic waves of frequencies arbitrarily lower than 3,000[GHz], propagated in space without artifical guide
4
Telecommunication - Any transmission, emission or reception of signs, signals, writings, images and sounds or intelligence of any nature by wire, radio, optical or other electromagnetic systems
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