You set up an experiment with two polarizer screens on an optical bench and coll

Question

You set up an experiment with two polarizer screens on an optical bench and collect data for the intensity of the light at the detector as you vary the relative angle between the transmission axes of the polarizers. You create a plot of light intensity (in lux) vs cos2? with your data and get a linear fit for your graph gives a slope of130.2 ± 4.204 and a y-intercept of 12.45 ± 2.141.

(a) What is intensity of the light source you used in your experiment?

____ (+/-) _____ lux

(b) What is ambient light in the room as you took your data?

_____ (+/-) ______ lux

Explanation / Answer

Part a) so you lose half on the first polarizer and the cos(theta)^2 on the second so

I = I0/2 cos(theta)^2

so I0/2 = 130.2 +/- 4.204

so I0 = 260.4 +/- 8.408

Part b) background is the intercept so 12.45 +/- 2.141

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