In Figure, unpolarized light is sent into the system of three polarizing sheets, where the polarizing directions of the first and third sheets are at angles 1 30 (counterclockwise) and 3 30 (clockwise) What fraction of the initial light intensity emerges from the system X...

In Figure, unpolarized light is sent into the system of three polarizing sheets, where the polarizing directions

Question:

In Figure, unpolarized light is sent into the system of three polarizing sheets, where the polarizing directions of the first and third sheets are at angles θ1 = 30? (counterclockwise) and θ3 = 30? (clockwise). What fraction of the initial light intensity emerges from the system?