CollegeHigh School / Physics


Laser light is passed through two polarizers. As the second polarizer (the analyzer) is rotated by hand, the relative light intensity is recorded as a function of the angle between the axes of polarization of the two polarizers. The angle is obtained using a Rotary Motion Sensor that is coupled to the polarizer with a drive belt. The plot of light intensity versus angle can be fitted to the square of the cosine of the angle allowing us to verify the Law of Malus.


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50_Polarization_Verify_Malus__Law.cap 35.63 MB
50_Polarization_of_Light.docx 2.40 MB
50_Polarization_of_Light.pdf 1.05 MB

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The PASPORT Rotary Motion Sensor measures position, velocity, and angular and linear acceleration.

Polarization Analyzer

Polarization Analyzer

Measures relationship between light intensity transmitted through set of polarizers and angle of the polarizers.

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Source: Lab #50

Universal 550 Physics Experiment Manual