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Wednesday 9 December 2015

What slows your Wi-Fi? | #SciSparksAdvent

Research has shown that there might be more to a slow internet connection than first meets the eye. Check out this article for more information -
"Christmas lights may be crippling your WiFi, or at least that was the takeaway from headlines circulating earlier this week.
The claim isn’t simply fodder for the #WarOnChristmas debate. It’s based on some basic principles of physics.
But how bad is the problem and should you toss those twinkle lights in the trash so you can stream Love Actually without interruption? The answer depends on where your WiFi router is in relationship to the holiday lights and the size of those sparkling strands.
WiFi uses radio waves to communicate. Radio waves fall into a family of radiant energy known as the electromagnetic spectrum. Microwaves, infrared beams, visible light, ultraviolet rays and gamma rays are all part of this family. Like relatives arguing at the holiday dinner table, sometimes these waves interfere with each other.
The biggest pest for WiFi tends to be microwaves. If you stick your router next to a microwave oven and warm up a bowl a soup, you might notice a few connectivity issues. That’s because high-powered microwaves often operate at a frequency — 2.4GHz — used by most WiFi devices. Switch on the microwave, and your laptop can no longer distinguish between the WiFi signals and energy being produced by heating your Hot Pocket. Cell phones, bluetooth gadgets, some baby monitors, and cordless phones (remember those?) can create the same problem and interfere with your download speed.
Back to holiday lights. Their incandescent and LED bulbs emit light. Also, their wires are typically unshielded, meaning the electromagnetic radiation created by electricity pulsing through the cord can produce a very weak electromagnetic field.
More lights may mean a stronger field, thanks to a physical concept called linear superposition. Light waves, like all forms of electromagnetic radiation, moves in waves like water."
From -
http://www.pbs.org/newshour/rundown/war-on-christmas-lights-wifi-interference/

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