Experiment 5 - Polarization and Interference

Experiment 5 - Polarization and Interference - Polarization...

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Unformatted text preview: Polarization and Interference Experiment #5 Jae Chung 11/5/2007 Introduction: For this experiment, we first measured the intensity of light after filtration through two polarizers at various angles. Then, for the next part, we measured the locations of the double slit interference maxima for a laser. The first experiment, our value for I/I of incandescent light came out to 1.3025 0.0299. From the data obtained from the second part, we calculated a wavelength of 620.8 12.3nm for the laser. Procedure: Using a laser, polarizing filters, and a photometer, we studied the effects of Malus Law, which is represented by I = I / cos 2 (). By passing the light through the polarizing filter and observing the relative intensities we can figure out the exact shifts in intensity due to the angle of the polarizing filters. Shown below are the particular setups that we utilized. This portion of the setup consists of the component holders (with polarizers) and a linear translator that projects relative intensity values. The polarizers were rotated to a 0 o angle and an incandescent light source was turned on. The photometer was adjusted until the sensitivity was at the highest position without exceeding the maximum value. At this position, we had a sensitivity of 1 and selectivity of 0.4. We recorded the value at this position as I . Then, we recorded the relative intensities for each polarizer angle between o and 90 o with increments of 5 o . At 60 o , the photometers sensitivity was changed to 0.1. For the double slit diffraction experiment, we removed the incandescent light source and polarizers. With the laser set up on the left end of the track and the linear translator in the middle position, we adjusted the laser until the beam passed through the center of the hole in the linear translator. We then placed the red filter directly in front of the linear translator and the slide with slit C in front of the laser. With a piece of paper, we adjusted the position of slit C until the diffraction pattern became the laser....
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This lab report was uploaded on 04/07/2008 for the course PHYS 1493 taught by Professor Lab during the Fall '08 term at Columbia.

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Experiment 5 - Polarization and Interference - Polarization...

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