What's the colour?
If we put 3 pieces of standard polarised glasses together on the top of a intense white light source .2 pieces are overlapped - one vertically(not standing up!) placed on the top ,one horizontally at the bottom).The other one is rotated 45˚ and placed between the two. What will the colours be respectively in the middle(on the rotated one) and along the margin(out of the rotated one)?
1. The third one is slightly smaller than the others so that it can leave some margin.
2. The light source is wide enough to cover all the 3 pieces.