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- From: dvsg0223@uxa.cso.uiuc.edu (David Salamon)
- Subject: Re: Airport X-Rays
- References: <1992Jul13.020123.3132@mccc.edu> <13ra2gINN10i@grapevine.EBay.Sun.COM> <1992Jul23.115038.5296@werple.pub.uu.oz.au>
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- Organization: University of Illinois at Urbana
- Date: Fri, 24 Jul 1992 17:44:33 GMT
- Lines: 21
-
- smckinty@sunicnc.France.Sun.COM (Steve McKinty - Sun ICNC) writes:
-
- >The X-rays themselves won't do any damage, unless you're carrying something
- >like 1000ASA photographic film, but they use pretty hefty electromagnets
- >to focus the beam, so I never trust floppies or tapes in them, just in case.
-
- Just a physics point here, but electromagnets will not focus ANY
- electromagnetic wave, including X-rays. Remember superposition of fields?
- People have been trying to focus X-rays for many years without much success.
- Virtually all X-ray machines just use incoherent, unfocussed X-rays.
-
- If there are magnets in those X-ray machines, they are most likely in the
- motors running the conveyer belt.
-
- David
-
- --------------------------------------------------------------
- David Salamon Physics Graduate Student (Slave)
- d-salamon@uiuc.edu University of Illinois
- --------------------------------------------------------------
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