1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

How to make X-Ray visible

  1. May 20, 2005 #1
    Hey!
    Of course you can help me! :) I need some information about HOW TO MAKE X-RAY VISIBLE. I know that it depends on the atomic number, but I need it more specific, do you know where I can get some information about my problem?
    I don't want you to write an essay for me, but I really need some help, where I can find some useful texts!
    Thank you very much :)
     
  2. jcsd
  3. May 20, 2005 #2
    er..what????

    What do X-rays have to do with atomic numbers???

    Could you be a bit clearer in your meaning?
     
  4. May 20, 2005 #3

    SpaceTiger

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    One way is with a scintillator. Here's an interesting thread on the subject.
     
  5. May 20, 2005 #4

    Doc Al

    User Avatar

    Staff: Mentor

    Fluoroscopy

    Not sure what you're looking for, but do a Google on "Fluoroscopy". You'll find plenty of info on that technique which allows one to view x-rays by having them hit a fluorescent screen.
     
  6. May 20, 2005 #5

    brewnog

    User Avatar
    Science Advisor
    Gold Member

    Another way is by letting the X-rays fall onto a photosensitive film, before developing and fixing the film. This is how medical X-rays are taken.
     
  7. May 20, 2005 #6

    GENIERE

    User Avatar
    Science Advisor

    You can accelerate away from the x-ray source. At some appreciable fraction of C, the X-rays will begin to be visible to the unaided eye.

    ...
     
  8. May 21, 2005 #7
    wow, thank you very much for so many replies!!
    know i've got enough to read ;)

    some more questions i've got, which need to be explained in a very easy way:
    - How can you "create" x-rays?
    - and what can you do with it...

    it would be great if i get as much replies as yesterday :)
    thanks a lot!!
     
  9. May 21, 2005 #8

    brewnog

    User Avatar
    Science Advisor
    Gold Member

    Here's a lovely simple website which tells you 2 ways of making X-rays, in an extremely simple way! I'm sure someone will expand on this if it's too simplistic for you.

    Anyway, on to uses. As you probably know, a common use for X-rays is in medicine, especially when diagnosing broken and fractured bones. The X-rays penetrate right through the softer tissue, but are partially blocked by denser tissue, so leave a 'shadow', which is recorded on photographic film.

    A very similar technique can be used in industry to detect faults in welds on pressure vessels like aeroplanes and pipelines.
     
  10. May 21, 2005 #9
    hey!
    thank you very much!! this website is great!!
     
  11. May 21, 2005 #10

    What a great method!!!
     
  12. May 21, 2005 #11
    I actually do this for a living! We have X-Ray tubes, internal "crawling" tubes although I normally use Gamma sources such as Ir92, and Co60...just depends on the "quality" of the radiation suitable for the job.

    99% of the time we use film from Kodak,Fuji etc etc. but as mentioned there is flouroscopy for real-time viewing. There are also some fluorescing salt screens, but I have'nt had any exposure to them. Once again, it all depends on the sensitivity,contrast etc. required when you choose your medium.
     
  13. May 23, 2005 #12
    It's me again :smile:
    I've got another question to the x-rays:

    Why do we see something on a screen or an a picture or ... if the doctor x-rays e.g. my hand? Is there a more scientific answer than that the x-ray gets absorbed by my bones and there the picture stays white?

    Thanks for your effort!! :smile:
     
  14. May 23, 2005 #13

    pervect

    User Avatar
    Staff Emeritus
    Science Advisor

    I was just reading that they were recoverign the text of some old documents by irradiating them with x-rays. The ink used for the original set of documents would flouresce because it contained iron. I don't know the specific wavelength or any of the details.

    These are the sole surviving copies of some of Archimedes work. Google could probably find more info.
     
  15. May 23, 2005 #14

    brewnog

    User Avatar
    Science Advisor
    Gold Member


    Not really! Think of it as a shadow. The softer, more fleshy parts of your body allow more X-rays through, while your hard bones (and things like cartiledge and tumours) are denser, so let fewer X-rays penetrate. The areas on the photographic film which are more heavily exposed to X-rays turn black when developed.

    This is the basic idea of it. If you want more scientific stuff, try researching X-ray absorption spectra of the human body.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: How to make X-Ray visible
  1. X Rays (Replies: 8)

  2. How do X-rays work? (Replies: 19)

Loading...