Phys 1 Student Workbook.pdf

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Physics Labs with Computers, Vol. 1Student WorkbookP34: Polarization 012-07000APART III: Data Recording1. Adjust the polarizers for maximum transmission of light.2. When you are ready, start recording data. (Hint: Click the‘Start’ button in DataStudio or the ‘REC’ button inScienceWorkshop.)3. Begin turning the Polarization Analyzer slowly andsmoothly. Watch the results in the Graph display. Continueto turn the polarizer for at least one full rotation (360degrees).4. After at least one full rotation, stop recording data.5. Turn off the light source.Analyzing the DataUse the Graph displays to analyze your data.1. Examine the Graph display for ‘Light Intensity versus Angular Position’.2. Try to fit the data to a mathematical model.• Hint: In DataStudio, click the ‘Fit’ menu button and select ‘Polynomial’. InScienceWorkshop, click the ‘Statistics’ button and then select ‘Curve Fit, Polynomial Fit’from the Statistics menu. Note whether or not the ‘Polynomial’ model is a ‘good fit’.3. Next, examine the Graph display for ‘Light Intensity versus cosine (angle)’.• In DataStudio, click the second graph to make itactive. In ScienceWorkshop, select ‘Calculations,Cosine squared’ from the X-axis Input menu.4. Try to fit the data to a new mathematical model.In DataStudio, click the ‘Fit’ menu button andselect ‘Linear’. In ScienceWorkshop, click the‘Statistics’ menu and select ‘Curve Fit, LinearFit’.Answer the questions in the Lab Report section.p. 254 ©1999 PASCO scientific P34
Name _____________________ Class ______________ Date _________Lab Report - Activity P34: Polarization – Verify Malus’ LawWhat Do You Think?If the transmitted light is at maximum intensity when the two polarizers are parallel, andminimum intensity when the two polarizers are perpendicular, what is the relationship of theintensity of transmitted light to the angle of the polarizers between 0 and 90 degrees?Questions1. What is the shape of the graph of the Light Intensity versus the Angular Position?2. What is the shape of the graph of the Light Intensity versus the square of the cosine of theangle?3 Theoretically, what percentage of incident plane polarized light would be transmittedthrough three polarizers which each have their axes rotated 17 degrees from each other?Assume ideal polarizers and assume that the first polarizer’s axis is 17 degrees from theaxis of the second polarizer.P34 ©1999 PASCO scientific p. 255
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Phys 1 Student Workbook.pdf

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