Next:What are the common wLAN security threads?> FAILEDFeatured Answers Best answer BIGBANGMVEAuthorCreated 2023-04-08 02:42:13 (1) (0) Radio waves are a kind of electromagnetic wave whose wavelength falls in the electromagnetic spectrum. The radio waves have the longest wavelengths among ...
1）电波与光波还是很相像的，除了电波的波长比光波更长一些。2）有时候，你能从肤色上轻易地辨别出海外的学生来。另，an overseas students是不是打错了？
解析:根据第二段中They used radio waves instead of sound waves,since radio waves can penetrate fog and clouds,故选C。 知识模块:阅读理解 The biggest safety threat facing airlines today may not be a terrorist with a gun, but the man with the portable computer in business class. In the past...
1.判断下列句子中wave的词性及含义①To broadcast a programme means tosend it out by radio waves,so that it canbe heard on the radio or seen on TV.②I waved and said hello to him,but hejust ignored(忽视)me and walked away③Because the boat was turned upsidedown by the waves,he had ...
radio wave An electromagnetic wave having a low frequency and long wavelength. Radio waves are used for the transmission of both radio and television broadcasts. They also include the microwaves used for cooking. Some celestial objects, such as pulsars, also emit radio waves. See more atelectroma...
结果1 题目Which of the following is NOT an electromagnetic wave? A. Light B. Radio waves C. Sound waves D. X-rays 相关知识点: 试题来源: 解析 C。声音波不是电磁波。A 选项光、B 选项无线电波、D 选项 X 射线都是电磁波。反馈 收藏 ...
Radio waves are a type of electromagnetic radiation. The best-known use of radio waves is for communication.
Female Student: Well, if the radio waves are so good at getting through the universe, what’s the problem?Male Professor: Well, answer this: how come people have to turn off their cell phones and electronic devices when an airplane is about to take off?Male Student: The phones interfere ...
Electromagnetic radiationincludes light as well asradiowaves, and the two have many properties in common. Both arepropagatedthrough space in approximately straight lines at a velocity of about 300,000,000 metres (186,000 miles) per second and have amplitudes that vary cyclically with time; that ...
Radio waves are electromagnetic waves (light), but we can't see them. They have wavelengths between 1 millimeter (one-thousandth of a meter) and 100 kilometers (one kilometer is equal to one thousand meters). In terms of frequency, this is equivalent to 300 Gigahertz (one Gigahertz is equ...