Polarized Filters

[Xist]

In physics our professor explained and demonstrated how they work and I had some understanding before, but when he rotated one filter superimposed on another, I had an idea.

If you had round windows on your house or... portholes on your ship :P, instead of having shades, could you attach one filter to your window and frame the other one to rotate as you desire?

[chrisgerman1983]

interesting thought, problem is that they are always tinted so you would always be losing a significant amount of light. I also would not want to see the price tag on a 4ft polarizer

[Xist]

Yes, I figured that it would be prohibitively expensive. When the professor explained the filters, it sounded like they somehow worked as solar panels, which I must have misunderstood.

I keep visualizing a round filter in the middle of a rectangular window!