Radio wave

Rough plot of Earth's atmospheric transmittance (or opacity) to various wavelengths of electromagnetic radiation, including radio waves.

Radio waves are a type of electromagnetic radiation with wavelengths in the electromagnetic spectrum longer than infrared light. Radio waves have frequencies from 3 THz to as low as 3 kHz, and corresponding wavelengths ranging from 100 micrometers (0.0039 in) to 100 kilometers (62 mi). Like all other electromagnetic waves, they travel at the speed of light. Naturally occurring radio waves are made by lightning, or by astronomical objects. Artificially generated radio waves are used for fixed and mobile radio communication, broadcasting, radar and other navigation systems, communications satellites, computer networks and innumerable other applications. Radio waves are generated by radio transmitters and received by radio receivers. Different frequencies of radio waves have different propagation characteristics in the Earth's atmosphere; long waves can diffract around obstacles like mountains and follow the contour of the earth (ground waves), shorter waves can reflect off the ionosphere and return to earth beyond the horizon (skywaves), while much shorter wavelengths bend or diffract very little and travel on a line of sight, so their propagation distances are limited to the visual horizon.

单词	radio signal
释义	radio signal 英汉-汉英词典无线电讯号词组 \| 习惯用语您要查找的是不是： Radio Signaling Link RSL 无线信令链路 Audio signal 音频信号; 声频信号; 可听声信号; re-broadcasted radio signal 无线电转播讯号 Audio Signal Level 求得一声频讯号电平；求得一音频信号电平 radio signaling link 无线信令链路 Audio Signal Cable 音频信号线 directional radio signal 定向无线电信号 radio signal unstable 无线电接收信号不稳定；无线电台信号不稳定 radio signal 无线电讯号 radio signal interceptor 无线电信号截听器 radio telephone alarm signal generator 发线电话警报信号发生器英语例句库 This radio signal has a frequency of 800000 cycles per second. 这个无线电讯号的频率是每秒八百千周。声明：以上例句、词性分类均由互联网资源自动生成，未经过人工审核，其表达内容亦不代表本软件的观点；若发现问题，欢迎向我们指正。原声例句六级词汇分频周计划 The radio signal can be amplified. 无线电的信号可以放大。当月 CNN 10 学生英语 Voyager 1 sends a steady radio signal back to mission control. “旅行者 1 号”向任务控制中心发送了稳定的无线电信号。 VOA慢速英语_科技 It offers an unusual environment that permits researchers to record sensitive radio signals. 月球远端提供了一个不同寻常的环境，使得研究人员可以记录敏感的无线电信号。 6 Minute English 六分钟英语 Hmm. This antenna business doesn't sound secure – an antenna is used for sending or receiving radio signals. 哼。这个无线电的伎俩听上去并不安全。天线被用于发送或接受信号。宇宙奥秘 Using the radio signals, scientists have also been able to detect lightning strikes on other planets. 利用这些无线电信号，科学家们还能够探测到其他行星上的雷击。 Kurzgesagt 科普动画 But even if they transmitted radio signals like we do, it might not be very helpful. 但即使他们像我们地一样传输无线电信号，也可能没什么用。 CNN 听力 2021年3月合集 The pilot immediately radioed a distress signal and turned the plane back toward Denver International Airport. 飞行员立即用无线电发出求救信号，并返回丹佛国际机场。学生科学报 Those telescopes revealed particularly bright radio signals. 这些望远镜显示出特别明亮的无线电信号。当月 CNN 10 学生英语 2020年2月合集 Time to turn up the radio to CNN 10 because scientists say they've detected some mysterious radio signals from outer space. 是时候将广播调到CNN 10频道了，因为科学家们说他们已经检测到了一些来自外太空的神秘的无线电信号。 VOA Special 2017年10月合集 The telescope can be used to study radio signals coming from space. 该望远镜可用于研究来自太空的无线电信号。英语百科 Radio wave Radio waves are a type of electromagnetic radiation with wavelengths in the electromagnetic spectrum longer than infrared light. Radio waves have frequencies from 3 THz to as low as 3 kHz, and corresponding wavelengths ranging from 100 micrometers (0.0039 in) to 100 kilometers (62 mi). Like all other electromagnetic waves, they travel at the speed of light. Naturally occurring radio waves are made by lightning, or by astronomical objects. Artificially generated radio waves are used for fixed and mobile radio communication, broadcasting, radar and other navigation systems, communications satellites, computer networks and innumerable other applications. Radio waves are generated by radio transmitters and received by radio receivers. Different frequencies of radio waves have different propagation characteristics in the Earth's atmosphere; long waves can diffract around obstacles like mountains and follow the contour of the earth (ground waves), shorter waves can reflect off the ionosphere and return to earth beyond the horizon (skywaves), while much shorter wavelengths bend or diffract very little and travel on a line of sight, so their propagation distances are limited to the visual horizon. 近义、反义、联想词近义词 n. radio wave, radio emission, radio radiation 英英词典 radio signal n. a radio wave used to transmit and receive messages
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radio signal

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Radio wave

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