1.The frequency of the waves transmitted by a specific radio station. 2.A frequency within the range at which radio waves are transmitted, conventionally from 3 hertz to 300 megahertz, immediately below the range of microwave frequencies in the electromagnetic spectrum. ...
Radio Frequency射频 ; 无线电广播频率 ; 无线电频率 mains frequency[电]电源频率 ; 市电频率 ; 工频 ; 市电频次 双语例句 1You can't hear waves of such a high frequency.你听不到这么高频率的声波。《柯林斯英汉双解大词典》2The frequency of Kara's phone calls increased rapidly.卡拉打电话的频率迅速...
频繁the fact of sth happening often 3. [c][u] (声波或电磁波振动的)频率the rate at which a sound or electromagnetic wave vibrates(= moves up and down) 4. [c][u] 频率(无线电信号每秒电波数)the number of radio waves for every second of a radio signal...
Radio frequency is measured in units calledhertz(Hz), which represent the number of cycles per second when a radio wave is transmitted. One hertz equals one cycle per second; radio waves range from thousands (kilohertz) to millions (megahertz) to billions (gigahertz) of cycles per second. In...
Frequency changer to radio in waves maintainedABRAHAM HENRI
有变体名词 In physics, the frequency of a sound wave or a radio wave is the number of times it vibrates within a specified period of time. (物理学) 频率 You can't hear waves of such a high frequency. 你听不到这么高频率的声波。 ...a frequency of 24 kilohertz. …24千赫的频率。 英...
What are radiofrequency (RF) waves and how are they produced? The electromagnetic spectrum used in NMR corresponds to "radio waves" used in commercial communications. MRI involves the absorption and emission of energy by nuclei at a specific resonant(Larmor) frequency.The Larmor frequency scales di...
Radiofrequency(RF) refers to the portion of the electromagnetic spectrum in which electromagnetic waves can be generated byalternating currentfed to an antenna.1Electrosurgeryablation currently uses hectomeric wavelengths found in band 6 (300 to 3000 kHz), which are similar to those used for broadcas...
2Microwave communication uses (71) -frequency radio waves that travel in straightline sthrough the air. Because the waves cannot (72) with the curvature of the earth, they can be (73) only over short distance. Thus, microwave is a good (74) for sending data between buildings in a city ...
In the US, household electrical power is based on a single-phase, 120-volt ac power supply. Power measured at a wall outlet in a US home will yield sine waves that oscillate between ±170 volts, with the true-rms voltage measuring at 120 volts. The rate of oscillation will be 60 cycle...