Student Question: X-Ray Gates

We called the makers of the security gate we have at the entrance to the library.  Our gate is of the electromagnetic variety (they make other types of gates, too).  It’s basically a metal detector that is set up to detect a very specific frequency of metal.  There are some pretty good explanations on the web for how metal detectors work, if you’re curious.  If you have additional questions or concerns, please let us know.