Radioactivity Workshop usually follows the lecture, where the source
in significance of natural radioactivity is pointed out along with
some basic information on electromagnetic radiation.
The 15 minutes workshop
is possible in a longer version as well with more experiments and
XL: 1800x2545 (180K)
m: 2260x869 (151K)
XL: 5400x2077 (437K)
seconds, 1.2 MB)
cleaner experiment is carried out during the workshop to demonstrate
that radioactivity is all around us - dust particles from the air
are caught by a paper filter along with radon progeny; the
difference before and after 1 min of suction is clearly
demonstrated by the Geiger counter.