A beam of light traveling horizontally is made of an unpolarized component with intensity I0 and a polarized component with intensity Ip. The plane of polarization of the polarized component is oriented at an angle of θ with respect to the vertical. The data in the table give the intensity measured through a polarizer with an orientation of ϕ with respect to the vertical. (a) What is the orientation of the polarized component? (That is, what is the angle θ?) (b) What are the values of I0 and Ip?
| ϕ(°) | Itotal(W/m2) | ϕ(°) | Itotal(W/m2) |
| 0 | 18.4 | 100 | 8.6 |
| 10 | 21.4 | 110 | 6.3 |
| 20 | 23.7 | 120 | 5.2 |
| 30 | 24.8 | 130 | 5.2 |
| 40 | 24.8 | 140 | 6.3 |
| 50 | 23.7 | 150 | 8.6 |
| 60 | 21.4 | 160 | 11.6 |
| 70 | 18.4 | 170 | 15.0 |
| 80 | 15.0 | 180 | 18.4 |
| 90 | 11.6 |
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