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# Julia Heimark

3. Add three liters of water to the prism. Mark the point that the laser hits the wall. (is is Point a). Rotate the prism so that the path of the refracted beam (Points d to f) is parallel with the base of the prism. (You can see the base in the rst diagram of the procedure).

4. Move the prism aside. Connect Points d and f along with points d and b.

5. Attach a string to Point a and bring the string so that it passes through Point f, and then crosses line d-b. Mark where the string crosses line d-b and label this Point c.

Salinity (ppt)

Temperature (°C)

Distance from origin (in)

0

21

37.375

20

21

38.0

40

21

38.438

60

21

38.75

120

20

40.0

150

20

40.625

0

22

37.438

0

92

34.875

0

5

36.875

vinegar

21

37.938

oil

21

59.0

• 6.

Measure the distance from Point c to Point e.

• 7.

Add this distance to line e-b. You now have length L, which

you will use in trigonometry along with length X to nd θmb.

5 Data

# Figure 3: Salinity vs. temperature vs. distance from origin

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