An unpolarized beam of light is sent into a stack of four polarizing sheets, oriented so that the angle between the polarizing directions of adjacent sheets is 30°.What fraction of the incident intensity is transmitted by the system?

A polariser made of Polaroid polymer has an intensity transmittance of 90 percent for light polarised parallel to the peak-transmission axis, and 0.5 percent for light polarised perpendicular to that axis. In each case below, unpolarised light of intensity 10 W m−2−2 is incident on the first polariser. Usisng drag-and-drop, match up the results for the intensity in W m−2 transmitted after the last polariser. Two such polarisers oriented parallel to each other   Two such polarisers oriented at 0 and 90 degrees   Three such polarisers oriented at 0, 45 and 90 degrees. note: If possible could an explanation be provided with the answers? I am largely concerned with the understanding so i can reproduce the answers for similar questions.

Unpolarized light, such as sunlight, with intensity 1200 W/sq*m is passed through a single polarizing filter.  (a) What is the average intensity of the light after it has passed through this first filter? A second filter is now added to the path of this sunlight.  The axis of this filter is turned at an angle of 37 degrees to the direction of the first polarizing filter. (b) What now will be the Intensity of the light which has passed through both filters ?  Thank you for the help!! : )

A linearly polarized electromagnetic wave has an average intensity of 291 W/m2. This wave is directed towards two ideal polarizers (in real polarizers, transmission is also effected by reflection and absorption). Polarizer A is oriented with its transmission axis at an angle of 0₁ = 29.9° with the incident electric field. Polarizer B has its axis at an angle of 0₂ = 74.6° with the incident electric field, as shown in the figure. .0₂ View Along Axis Sideview What is the average intensity of the wave after it passes through polarizer A? What is the average intensity of the wave after it passes through polarizer B? Suppose that the two polarizers A and B are interchanged. What would the average intensity be after passing through both polarizers?