22116511
PHYSICS
STANDARD LEVEL
PAPER 2
Candidate session number
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Wednesday 11 May 2011 (afternoon)
Examination code
2
1 hour 15 minutes
2
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INSTRUCTIONS TO CANDIDATES
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Write your session number in the boxes above.
Do not open this examination paper until instructed to do so.
Section A: answer all questions.
Section B: answer one questions.
Write your answers in the boxes provided.
30 pages
© International Baccalaureate Organization 2011
0132
– 2 –
M11/4/PHYSI/SP2/ENG/TZ1/XX
SECTION A
Answer all questions. Write your answers in the boxes provided.
A1. Data analysis question.
The photograph below shows a magnified image of a dark central disc surrounded by concentric dark rings. These rings were produced as a result of interference of monochromatic light.
D
The graph below shows how the ring diameter D varies with the ring number n.
The innermost ring corresponds to n = 1. The corresponding diameter is labelled in the photograph. Error bars for the diameter D are shown.
1.8
1.6
1.4
1.2
D / cm
1.0
0.8
0.6
0.4
0.2
0.0
0
1
2
3
4
5
6 n 7
8
9
10
11
12
(This question continues on the following page)
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M11/4/PHYSI/SP2/ENG/TZ1/XX
(Question A1 continued)
State one piece of evidence that shows that D is not proportional to n. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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(a)
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(b)