Testing an iPad and iPod for Radiation
Purpose:After seeing this video: http://www.youtube.com/watch?v=LT6qHaKFgGY I decided to test my iPad and iPod, and see if I could detect above background radiation.
First I took background radiation readings with the
GM-45 Geiger Counter
You can see the step change in the radiation readings (in CPM, Counts Per Minute, when the iPad was placed over the GM-45:
I ran a similar test with a current generation iPod:
and got similar results:
So what is the source of the radiation? One likely candidate is potassium in the glass. I recall that this is an issue with Photomultiplier Tubes (PMTs) used in radiation detection sensors, and sometimes special glass with low potassium levels is used to reduce this problem.
To sumamrize: the slightly higher radiation readings are possibly due to potassium in the glass, and are not significantly above background levels, and are in-line with other common items, such as salt substitute.
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firstname.lastname@example.org Chris Smolinski
Modified September 14, 2011