Quiz11_solutions

Quiz11_solutions - Physics 222 Fall 2011 Name:_ Section:_...

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Fall 2011 Name:_______________ Section:______________ Quiz 11A 1. With a polarizing filter how can you check if the light entering your eye from a particular direction is polarized or not? Solution : If the light entering your eye is already polarized in a particular direction, then holding an ideal filter in front of your eye in one orientation will let all the light through, but if you rotate the filter by 90 degrees the filter will block out all the light and you will see nothing. At all angles in between more or less light will be progressively transmitted. However if the light entering your eye is unpolarized it does not matter how you hold the filter, only 50% of the light will ever be transmitted. For a real (non-ideal) filter there will always be some light that is not transmitted unlike in the ideal case, however this does not effect your ability to check whether or not the light is polarized. 2. Two ideal polarizers are oriented at 65 degrees to one another. Unpolarized light falls on them. What fraction of the light intensity is transmitted? Solution
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Quiz11_solutions - Physics 222 Fall 2011 Name:_ Section:_...

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