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Crossed Polarizers - Quantitative:

DATA TABLE:

Degrees	Resistance	Light intensity (1/R)
0
15
30
45
60
75
90
105
120
135
150
165
180
195
210
225
240
255
270
285
300
315
330
345
360

Graph light intensity, 1/R vs. angle between polarization axes. Note that the light intensity indicator 1/R is an arbitrary unit. If we had a true light intensity meter our light intensity units would be in "lux".

Question: If you buy polarizing sunglasses how can you be sure they are truly polarized?

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