Investigating What Factors Affect Reflection
Prediction: The angle of incidence is proportional to the angle of
Refraction.
Angle I
Angle r
10
6
20
14
30
21
40
28
50
34
60
39
70
44
80
47
Results:
Angle I
Angle r
10
8
20
15
30
20
40
28
50
33
60
38
70
42
80
47
Averages of both results:
Angle I
=======
Angle r
10
7
20
14.5
30
20.5
40
28
50
33.5
60
38.5
70
43
80
47
Averaging= I=20 r=14+15
2
R=14.5
Analysing Graph
The graph shows my averages of the angle of Incidence against the
angle of Refraction. The graph shows a very slight curve. This
suggests that my results are not quite accurate. This could be because
the angles are not accurate, or in proportion. This means that at the
start of the graph, the results are in proportion but as the angles
increase, the angles become less proportionate.
E.g. If I double the angle of incidence the angle of refraction will
also be doubled-
Angle I=20 Angle r=14
When doubled Angle I=40 Angle r=28
This does not happen on my averaged results, which means that my graph
is not accurate. This means that my Graph does not support my
prediction.
A better way of getting results that are more proportional would be to
use 'Snell's Law'. This means that you multiply the angle of incidence
by sin and the angle of refraction also by sin; separately.
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