3. Data analysis

Distance
Although it is quite obvious that the further away the Geiger Counter is from the radiation source, the lower the reading will be, with this experiment, we can find out the radius of the radioactivity of the source.


Distance between Geiger Counter and Radioactive source/counts recorded
1mm
5mm
10mm
15mm
20mm
25mm
Test 1
4560
2065
55
15
12
7
Test 2
4557
2044
37
18
6
6
Test 3
4638
2064
42
20
10
1
Test 4
4470
2079
47
21
7
6
Test 5
4522
2056
56
25
13
8
Test 6
4451
1999
51
19
11
10
Average
4533
2051.166667
48
19.66666667
9.833333333
6.333333333
Table 1
These results are then plotted on a graph as seen below:


Final Graph for ISS.png
Figure 9




The line is the best fit line for the results. However, the results are slightly higher than the expected result done by others below:
Actual graph.png

Figure 10

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