Polarized light by reflection

My family comes to visit me, so I won't post as often compared to the last few weeks.

We went to the science museum and watched a 3D show. It used polarized light to control the image seeing by each eye, thus creating 3D images. Before the show, I played a bit with the polarizer and found out the polarization of light by just reflection off surfaces is much more than I thought.

In basic physics, there is a calculation determining the specific angle for a light to be polarized by water surface. As I thought before, 1 special angle vs. R (0~180 degrees) is almost nothing, so I did not expect to see any polarized light coming, say in the auditorium. But apparently I was wrong ^^"

There were many large patches of polarized light.