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How anti-theft tags work - magnetostriction
- Published_at:2015-11-30
- Category:Science & Technology
- Channel:Applied Science
- Ranked in:
- tags: magnetostrictive Magnetostriction acoustomagnetic magnetoacoustic anti-theft tag marker physics metglas iron ben krasnow applied science oscillator microscope
- description: Anti-theft tags contain a tiny mechanical oscillator that is activated by a magnetic field. The detectors at a shop's doorway can detect the oscillation magnetically. The tag can be activated and deactivated by magnetizing or demagnetizing it,...
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