As you may have noticed back in your early physic classes where we would drop a pebble into the pool of water to watch the wave action, it was also noted how waves can cancel each other out. So if you move to some null spot, yes that can happen.
Bob
A few days ago, I noticed that my wireless connection had suffered an extreme drop in speed, going from about 20 Mbps to around 20 kbps. I eventually found that the decrease in wireless speed only occurred when I plugged my laptop into a specific set of electrical outlets - staying in the same location, but using battery power, resulted in much higher speeds, and using a different AC adapter did not seem to have an effect. Strangely, the outlets still seem to work - my computer still receives power, and mobile devices like phones and tablets do not see a decrease in speed; the drop in speed only seems to affect computers. I've never heard of anyone having a problem like this before, so does anyone know what might be causing the outlets to affect the wireless signal, and how I might fix it?

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