Physics

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M11/4/PHYSI/SP2/ENG/TZ1/XX

22116511

PHYSICS
STANDARD LEVEL
PAPER 2

Candidate session number
0

0

Wednesday 11 May 2011 (afternoon)

Examination code
2

1 hour 15 minutes

2

1

1



6

5

1

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INSTRUCTIONS TO CANDIDATES






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

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M11/4/PHYSI/SP2/ENG/TZ1/XX

SECTION A
Answer all questions. Write your answers in the boxes provided. A1. Dataanalysisquestion.

Thephotographbelowshowsamagnifiedimageofadarkcentraldiscsurroundedbyconcentric darkrings.Theseringswereproducedasaresultofinterferenceofmonochromaticlight.

D

The graph below shows how the ring diameterDvaries with the ring numbern. The innermost ring corresponds to n = 1. The corresponding diameter is labelled in the photograph. ErrorbarsforthediameterDare 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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(Question A1 continued)
StateonepieceofevidencethatshowsthatDisnotproportionalton.
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(a)

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(b) Onthegraphopposite,drawthelineofbest-fitforthedatapoints.

[1]

[2]

(This question continues on the following page)

Turn over
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M11/4/PHYSI/SP2/ENG/TZ1/XX

(Question A1 continued)

(c)

Theorysuggeststhat D 2 = kn.

AgraphofD2againstnisshownbelow.Errorbarsareshownforthefirstandlastdata pointsonly.
3.5
3.0
2.5
2

2

D /cm

2.0
1.5
1.0
0.5
0.0

0

1

2

3

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6
n

7

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9

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(i)

Using the graph on page 2, calculate the percentage uncertainty in D2, of the ringn=7.
[2]

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(This question continues on the following page)

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(Question A1 continued)

(ii) Based on the graph opposite, state one piece of evidence that supports the relationship D 2 = kn.
[1]

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