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?