Really stupid science question. I understand the very basics of lasers and read about someone doing the same principle with sound waves and made a device that emits sound, but you can only hear it when it is pointing straight at you. I thought this was interesting and wondered if an electromagnet could be made to work this way. I understand that magnetic fields are usually circular, but could they be focused into more of a linear beam. I'm not sure what the practical use would be, but it would be interesting to see if you could attract a small object from say a foot away by just pointing a focused electromagnet at it. I'm just curious. Thanks.
2006-10-09
04:13:22
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6 answers
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asked by
bernie_bernoulli
2