Essay PreviewMore ↓
PART ONE: POLARIZATION
Two polarized disks were put into a grooved holder with their polarization axes lined up, and a bright red light emitting diode (LED) was placed on one side, and a light sensor was placed on the other side. Light intensity was measured as a function of the plastic rotating polarizer angle from 0 to 180 degrees. Science Workshop was used to measure the intensity for every 5-degree rotation (Fig 1).
The mineral calcite exhibits birefringence (double refraction), and therefore has two different values for its index of refraction. A calcite crystal was placed on top of print and rotated in order to see the difference between the two rays, the ordinary ray and the extraordinary ray. A polarizer was then used to look at the images formed by the calcite.
In order to determine the stress points in a plastic object, we used a photoelastic effect where we looked at the object through a polarizer. When the plastic was squeezed together, changes in the color occurred, displaying points with greater stress.
Polarization by reflection from a non-metallic surface was used in this method in order to help distinguish the plane of incidence, and Brewster's angle. A cardboard disk with a picture on it and a polarizer were placed in the holder, with a piece of black plastic (n=1.491) in between them. Brewster's angle was determined from tan = n, and =56. We then looked through the polarizer at this angle and were able to determine the polarization direction. We also viewed the reflection of a ceiling light directly above the black plastic in order to determine if it was polarized in this case.
In order to determine polarization by scattering, a jar was filled with water and dried milk, and then a flashlight was shined directly down into the top of the jar. From the side of the jar, we looked through a polarizer at the scattered light. From this we determined if the light was horizontally polarized.
PART TWO: LIGHT MEASUREMENTS
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.
How to Cite this Page
"Polarization." 123HelpMe.com. 28 Feb 2020
Need Writing Help?
Get feedback on grammar, clarity, concision and logic instantly.Check your paper »
- The United States of America has engaged in the battle known as political polarization since before its foundation in 1776. From the uprising against the powerful British nation to the political issues of today, Americans continue to debate about proper ideology and attempt to choose a side that closely aligns with their personal beliefs. From decade to decade, Americans struggle to determine a proper course of action regarding the country as a whole and will often become divided on important issues.... [tags: Government, Congress]
1401 words (4 pages)
- I. The leaves of the electroscope open up when a positively or negatively charged rod is brought near its tip because of polarization. Polarization is not a permanent charge; we are not charging the electroscope. When we approach the electroscope with a negatively charged rod, the electrons in the electroscope rush down to the leaves. This is due to the fact that like charges repel. Now that both of the leaves are negatively charged, they will repel and therefore open up. When we approach the electroscope with a positively charged rod, the electrons are attracted to the rod and rush to the tip rather than the leaves of the electroscope.... [tags: Electric charge, Electricity, Electrostatics]
1732 words (4.9 pages)
- The polarization of the British political system can be traced back to the movement of Thatcherism. Thatcherism can be seen as the conviction politics, economic, social policy, and is the political movement that can even resemble Reaganomics. Just like Reaganomics, Thatcherism is considered a conservative movement that emphasizes heavily on the free markets, restraining government spending, privatization, deregulation, and tax cuts. These are the policies that Margaret Thatcher focused on; this political movement took place between 1979 and 1990 while she was the Prime Minister of the British Government.... [tags: politics, economic, social policy]
1036 words (3 pages)
- The Great Influenza: Polarization of Pathways Grey areas. The human mind is susceptible to an indefinite thought when pondering upon something that is not explicitly defined. It often fails to take a stand one way or the other and rather resides in the middle ground, lacking a definite stance or conception. This phenomenon of lacking concreteness is reflected throughout our existence; from subtle grey areas in such decisions as food choices to grey areas in our understanding of the universe, we are encompassed by the lack of concreteness.... [tags: Science, Scientific method, Uncertainty]
1085 words (3.1 pages)
- Polarization is the separation of the negative and positive charges within an atomic object, a nuclear, and a chemical system. Through induction, the movement of electrons within an object mixes. The system or the object is has an excess of the negative electrons concentrated on one side while the other side has a concentration of positive electrons. This leads to concentration of the opposite charges on different ends of the object (Askeland and Pradeep 116). This paper studies the misconceptions and the confusions regarding the magnetic and the electric polarization.... [tags: chemical systems, electrons, negative charge]
1096 words (3.1 pages)
- Extreme Political Polarization The political climate today is increasingly becoming more turbulent as Republicans and Democrats volley for superiority in Washington. The two parties are becoming more polarized by the hour, and this is affecting the ability of the government to move forward and pass legislation and continue to improve America. The Senate is in a state of gridlock on some of the most important issues to the people of the United States to date, and yet the senators which the people elected are instead caught up in fighting the people on the other side of the aisle.... [tags: Politics]
1033 words (3 pages)
- Polarization Polarization is a tendency to reason only in terms of extremes or opposites. The most common type of polarization is group polarization. Group polarization in general refers to the notion that judgments made by a group tend to be more extreme than judgments made by individual members. The concept of group polarization developed from a notion of the “risky shift.” It was originally thought that after group discussion, individuals would make riskier decisions than before. However, researchers then realized tendency could also be to the other extreme; that decisions could shift to a more cautious judgment.... [tags: essays research papers]
630 words (1.8 pages)
- Polarization Introduction: PART ONE: POLARIZATION Method 1: Two polarized disks were put into a grooved holder with their polarization axes lined up, and a bright red light emitting diode (LED) was placed on one side, and a light sensor was placed on the other side. Light intensity was measured as a function of the plastic rotating polarizer angle from 0 to 180 degrees. Science Workshop was used to measure the intensity for every 5-degree rotation (Fig 1). Method 2: The mineral calcite exhibits birefringence (double refraction), and therefore has two different values for its index of refraction.... [tags: Papers]
612 words (1.7 pages)
- On Tuesday, November 14, 1995, in what has been perceived as the years biggest non-event, the federal government shut down all "non-essential" services due to what was, for all intents and purposes, a game of national "chicken" between the House Speaker and the President. And, at an estimated cost of 200 million dollars a day, this dubious battle of dueling egos did not come cheap (Bradsher, 1995, p.16). Why do politicians find it almost congenitally impossible to cooperate.... [tags: essays research papers]
2337 words (6.7 pages)
- Use of Polarization in Goodbye, Mr. Chips Opposites attract. James Hilton uses this fact in Goodbye, Mr. Chips to create tension in the story; however, he makes greater use of this polarization to develop the character of Chips. Mr. Chips and Katherine Bridges may be viewed not only as opposites but also as arguments. Hilton uses thesis in the form of young Chips and antithesis in the form of Katherine Bridges to arrive at synthesis, the personality and character of the mature schoolmaster.... [tags: Goodbye, Mr. Chips]
660 words (1.9 pages)
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 light directly above. Had we isolated it better, it may have then been polarized, but under the circumstances, there was too much light involved.
Using the polarizer, in method five, we were able to confirm the prediction about scattered light given in the lab manual. The light was dark when the polarizer was at 0 and 180 . When the polarizer was at 90 and 270 , the light coming through was bright. The scattered light is horizontally polarized.
In part two, method one, my curve again had larger values than the calculated values. I feel this could have occurred because not only could we have been more precise, however, our light wasn't the only light in the room and there could have been some interference from the other light sources. For a real light bulb, I would expect the inverse square law to fail at distances because