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- Xref: sparky sci.electronics:13256 comp.sys.ibm.pc.hardware:20236
- Path: sparky!uunet!dtix!oasys!dlee
- From: dlee@oasys.dt.navy.mil (David Lee)
- Newsgroups: sci.electronics,comp.sys.ibm.pc.hardware
- Subject: Re: Airport X-Rays
- Message-ID: <22754@oasys.dt.navy.mil>
- Date: 24 Jul 92 18:46:25 GMT
- References: <1992Jul13.020123.3132@mccc.edu> <BrwMMA.6rG@news.cso.uiuc.edu>
- Reply-To: dlee@oasys.dt.navy.mil (David Lee)
- Followup-To: sci.electronics
- Organization: Carderock Division, NSWC, Bethesda, MD
- Lines: 31
-
- In comp.sys.ibm.pc.hardware, dvsg0223@uxa.cso.uiuc.edu (David Salamon) writes:
- >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.
-
-
- I think it would be smart to avoid any magnetic fields, either generated
- by permament magnets or electromagnets,.i.e. motors,..etc. Data on
- floppy or hard disk is of a magnetic nature; and any magnetic field
- can, erase if strong enough, or distort so that the pc cannot recover
- the data.. PC users have been cautioned constantly about leaving floppy
- disk by telephones and on top of monitors.. It might not happen, but it
- could.. So, why take the risk??? It's amazing where you can find magnetic
- fields in an office or home environment!!!
-
- Fogging of photographic film is another matter and caused by high energy
- particles (X-rays,..etc.) and not by magnetic fields..
- .
- .
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