Lab 25 polarized light | Physics homework help

Lab Report                                                                Name: ____________________                                                                                                 Section: ___________________  Polarized Light  Part 2 – 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?