advantages of using a radioactive material with a short half-life? Watch

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Tess06
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a radioactive material is added to paint to see if the dye (or something like that) has settled evenly. what would be an advantage of using a radioactive source with a short half-life?
P.S. does anyone have any recommendations on how to revise for physics???? pleeeeeease????
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F1 fanatic
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(Original post by ZsaZsa)
a radioactive material is added to paint to see if the dye (or something like that) has settled evenly. what would be an advantage of using a radioactive source with a short half-life?
P.S. does anyone have any recommendations on how to revise for physics???? pleeeeeease????
Well the main answer would be so you dont start radiating anything & anyone that goes near it. Radiation is carcegenic after all. You dont want it to last for long thats for sure!

As for revision questions are the best thing.

I would say read through a topic first,
Write out some notes
Stick the important formulas on the wall
Learn the notes/ techniques
Try questions
Test yourself with others

Whiteboards are good too... you can revise all sorts with a whiteboard... hope it helps
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Ultraviolet
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Revision - -I find that if you can't remember something using a little picture story in your head works well . I have a little comic strip in my head for the electromagnetic spectrum. It works well if you remember visuals and stories better than hard facts
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idiopathic
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(Original post by ZsaZsa)
a radioactive material is added to paint to see if the dye (or something like that) has settled evenly. what would be an advantage of using a radioactive source with a short half-life?
P.S. does anyone have any recommendations on how to revise for physics???? pleeeeeease????
Surely it's just because it's quick? You don't want to be waiting years for it to decay...?
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vickyrkenya
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Just to echo what was said above, it is certainly because the high levels of radioactivity will decrease quickly. For instance radioactive tracer solutions that are used in medicine, are injected into a human body to enable the specialists to see how organs are functioning etc. If this radioactive substance was to remain at the same 'radioactivity' it could cause serious damage to the body, if however it decayed quickly, the damage would be very minimal.
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