Hello , please answer and explain :

This part requires that we look at how polarizers are used to filter and attenuate light. A beam of unpolarized light is passed through two polarizers and then projected onto a light detector that measures illuminance (in units of lux). You adjust the axis of the first polarizer so that it is vertical, rotate the axis of the second polarizer relative to the first polarizer, and measure the signal from the detector.

You record this illumination and the angle (in ) between the axes of the polarizers ( as shown in table 1)

A photograph of the setup is shown in Figure 4 below.

\fcapteur de Lumiere lumiere blanche polariseur 1 polariseur 2 Fig. 4 - Experimental setup to study light polarization1 Angle (degres) illumination (lux) (cos angle)? IN 90 0 105 5.698394775 0.066987 120 18.66958618 0.25 135 37.12768555 0.5 150 54.01138306 0.75 165 65.3024292 0.933013 180 67.38204956 1 195 60.72021484 0.933013 10 210 46.48010254 0.75 11 225 28.95019531 0.5 12 240 12.20748901 0.25 13 255 1.84463501 0.066987 14 270 0 15 285 3.842010498 0.066987 16 300 16.95419312 0.25 17 315 34.44885254 0.5 18 330 51.5675354 0.75 19 345 63.6340332 0.933013 20 360 67.32330322 1 21 15 61.47216797 0.933013 22 30 47.53753662 0.75 23 45 29.36141968 0.5 24 60 12.10174561 0.25 25 75 1.022186279 0.066987 26 90 0\f