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Wi-Fi (/ ˈ w aɪ f aɪ /) [1] [a] is a family of wireless network protocols based on the IEEE 802.11 family of standards, which are commonly used for local area networking of devices and Internet access, allowing nearby digital devices to exchange data by radio waves.
Prior to the introduction of Wi-Fi, one of the biggest applications of 5 GHz band was the Terminal Doppler Weather Radar. [ 25 ] [ 26 ] The decision to use 5 GHz spectrum for Wi-Fi was finalized at the World Radiocommunication Conference in 2003; however, meteorological authorities were not involved in the process.
In 2015, researchers at the University of Washington introduced power over Wi-Fi, which trickle-charges batteries and powered battery-free cameras and temperature sensors using transmissions from Wi-Fi routers. [124] [125] Wi-Fi signals were shown to power battery-free temperature and camera sensors at ranges of up to 20 feet. It was also shown ...
PRIVATE WiFi will automatically activate and connect to an encrypted server whenever you access the internet. If you change this default setting, you can activate PRIVATE WiFi at any time clicking on the status icon ( PC: right-click the icon in the Taskbar at the bottom right of your screen, Mac: click the Menu Bar icon at the top right of ...
An attic fan installed underneath a roof. A powered attic ventilator, or attic fan, is a ventilation fan that regulates the heat level of a building's attic by exhausting hot air. A thermostat is used to automatically turn the fan off and on, while sometimes a manual switch is used. An attic fan can be gable mounted or roof mounted. Additional ...
Spoilers ahead! We've warned you. We mean it. Read no further until you really want some clues or you've completely given up and want the answers ASAP. Get ready for all of today's NYT ...
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The electric and magnetic field waves in the far-field travel at the speed of light. They have a special restricted orientation and proportional magnitudes, E 0 = c 0 B 0 {\displaystyle E_{0}=c_{0}B_{0}} , which can be seen immediately from the Poynting vector .