Three polarizing disks have planes that are parallel and centered on a common axis. The direction of the transmission axis $($dashed line$)$ in each case is shown relative to the common vertical direction. An unpolarized beam of light is incident from the left on the first disk with intensity $S_o=860\frac{W}{m^2}.$ Calculate the transmitted intensity if ${}_1=28\mathrm{.}0,{}_2=34\mathrm{.}0,$ and ${}_3=39\mathrm{.}0.$

$\frac{W}{m^2}$