Question of the Week Podcast

Question of the Week episode

Sun, 4th Jul 2010

Why does an electric toothbrush affect my vision?

Electric toothbrush (c) Bergsten

When brushing one's dental equipment with an electric toothbrush, one may notice a slight wobbling of television images or LED clock displays. Why does this happen?  Plus, we ask why the Americas hadn't developed the same kinds of technologies as the Old World at the time of European contact.

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