d.PART TWO: LIGHT MEASUREMENTSMethod 1:A halogen bulb light source was set up at the end of a yardstick, and a light sensor was set up on the yardstick beginning at 0.1m from the light source. Science Workshop was again used to measure the intensity of light ranging from 0.1m to 1.00m (Fig. 2).Results and Conclusion:In part one, method one, the curve for my values was greater than that for the calculated values, but was quite similar other than that. This could be due to the fact that our methods weren’t as precise as they could have been and if we had been more precise, our values would have been too.In method two, the calcite crystal created a double image, and as you rotated the crystal, one image stood still (formed by the ordinary ray), while the other one rotated around it (formed by the extraordinary ray). When the print is viewed through the crystal and then through a polarizer which is being rotated, we were able to see the in-phase and out-of-phase of the polarized light. The images would switch so that only one of them was viewed at a time. This told us that the relative polarization of one print image was horizontal, and one was polarized laterally. In order to go from maximum intensity of one image to the maximum image of the other, the polarizer had to be rotated 90 degrees.In method three, the greatest stress points appeared mainly around the edges of the plastic, near the joints. At these points, there was the most color, and the center of it was all black.Method four had a polarizing angle of 56 and the polarization was determined to be horizontal. We determined this by looking at the picture on the front of the lab and finding out what the polarization was for the polarizer, and then looking through it at different angles (0 ,90 , 180 , 270 ). When looking at the ceiling light reflection, it was not polarized because there are so many rays coming from all different directions and interfering with the lig...
