Final Report - Background In order to completely understand...

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Background In order to completely understand how polariscopes work and what they are, you must have a basic understanding of the polarization of light. By nature, light travels through waves of various directional orientations (horizontal, vertical, or anywhere in between). In order to create a polariscope, you have to change this through use of polarized film. What polarized film does is allow only one orientation of light to pass through (let’s say vertical for this example). It does this through use of miniscule “strips” in the film that block out light. When another polarized film is placed parallel to the first, but rotated 90 degrees so as to block out the other orientation of light (horizontal), no light passes through the pair of films. Now that we know how the polarization of light works, let’s take a look specifically at polariscopes. A basic polariscope consists of, in order of arrangement, a diffused light source, a
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polarizing film, a translucent object, and a polarizing film rotated 90 degrees from the first. The key with polariscopes is the placement of the translucent object: it will work only if the object is located between the two polarized films. This is because of how the light is traveling. When it hits the translucent object, the light is all either horizontal or vertical depending on the
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This note was uploaded on 09/20/2011 for the course EAS 102 taught by Professor Chen during the Spring '10 term at Miami University.

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Final Report - Background In order to completely understand...

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