i have a cheap polarizing shade i bought from walmart. i aligned my polarizing shades with the polarized light coming from my laptop, however not all the light was blocked. just to be extra sure that it wasn't my lcd that was being weird, i rotated a laser beam through my polarizing shades, and still some light was able to get through. the amount of light reduced but not all of it was blocked. i don't understand. the polarizer did indeed decrease the amount of light going through it when aligned in the same direction as the E-field oscillation, however not all of the light was blocked. how can light not be blocked in this case? i held my polarizers up against the visible spectrum displayed on my lcd screen and it appeared to block the blue/violet end the least and the red/orange end the most. this implies that the space between each conducting material is not that small. However, my laser light was red and so this does not really explain why my laser light was able to get through.