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| William McCormick |
 Posted: Tue Apr 15, 2008 4:43 pm Post subject: Check Out These Ultra Violet Sensing Beads |
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Forum Ph.D.
Joined: 03 Apr 2008
Posts: 900
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These are beads that are effected by Ultra Violet rays. They are pretty cool. I am sure they have had similar things in the past. I just thought that these were an interesting form of the phenomena.
Through a double pane glass window the sun did not effect the beads quickly. With time they did slightly effect them. But most of the effect was blocked.
I filmed them on Easter and gave them to my niece. She really liked them. As long as they do not turn her colors, I should be alright.
http://www.Rockwelder.com/WMV/Untraviolet/Untraviolet.html
This is the link to the fellow I bought the beads from, and what he has for sale and to his personal information.
http://search.ebay.com/_W0QQsassZonlinesciencemall
http://myworld.ebay.com/onlinesciencemall
I have purchased sodium acetate from him, niobium magnets. All kinds of chemicals. I was always pleased.
Sincerely,
William McCormick
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| Dishmaster |
| Posted: Wed Apr 30, 2008 7:49 am Post subject: |
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Forum Junior
Joined: 30 Apr 2008
Posts: 258
Location: Heidelberg, Germany
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| Yeah, so what? Well, I cannot watch this video, because I'm running Linux. But it is well known, that simple window glass efficiently blocks UV radiation. |
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| SuperNatendo |
| Posted: Wed Apr 30, 2008 8:21 am Post subject: |
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Forum Masters Degree
Joined: 10 Dec 2007
Posts: 518
Location: Nashville, TN USA
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I'm running linux, the video plays fine for me ^_^
Of course, Im using stuff from the non-free (free as in Free Beer) repositories.
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“It’s no wonder that truth is stranger than fiction. Fiction has to make sense.” - Mark Twain |
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| William McCormick |
| Posted: Fri May 02, 2008 3:19 pm Post subject: |
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Forum Ph.D.
Joined: 03 Apr 2008
Posts: 900
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| Dishmaster wrote: |
| Yeah, so what? Well, I cannot watch this video, because I'm running Linux. But it is well known, that simple window glass efficiently blocks UV radiation. |
The car window glass in direct sunlight did not.
Sincerely,
William McCormick
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| Dishmaster |
| Posted: Sat May 03, 2008 2:41 am Post subject: |
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Forum Junior
Joined: 30 Apr 2008
Posts: 258
Location: Heidelberg, Germany
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| William McCormick wrote: |
The car window glass in direct sunlight did not. |
Then this glass is different. It depends on its purity and the content of trace elements. You can modify the transparency of glass for certain wavelengths with the recipe. |
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| Dishmaster |
| Posted: Sat May 03, 2008 2:47 am Post subject: |
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Forum Junior
Joined: 30 Apr 2008
Posts: 258
Location: Heidelberg, Germany
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Okay, I watched the video. This phenomenon is called fluorescence. The beads are made of (or contain) stuff that react on UV radiation, alright. This material has the ability to re-emit the absorbed radiation with a different wavelength.
http://en.wikipedia.org/wiki/Fluorescence |
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| William McCormick |
| Posted: Sun May 04, 2008 9:21 am Post subject: |
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Forum Ph.D.
Joined: 03 Apr 2008
Posts: 900
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| Dishmaster wrote: |
| William McCormick wrote: |
The car window glass in direct sunlight did not. |
Then this glass is different. It depends on its purity and the content of trace elements. You can modify the transparency of glass for certain wavelengths with the recipe. |
It has plastic in it. The front window glass. The plastic may not accelerate the UV back up to safe ambient radiation speeds. And the thinner glass on either side may not have the depth to do it.
The plastic beads may also slow down ambient radiation.
Sincerely,
William McCormick
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