I'm sure the patterns appear if the screens are closer apart than two feet. According to the above post, it is not polarized light but it is an interference pattern.
Hi, I'm Bob. Earlier in my life, I was a computer programmer. Now I'm working on an invention idea. There seems to be a tantalizing possibility that the invention could actually work. While it is not directly related to my question, both the question and the invention have to do with optics.
If you take two window screens and hold them, say, a couple feet apart and look through both of them, you see what looks like interference patterns. These types of patterns can also be seen in transparent materials when polarized light is passed through them. More on stressed materials and...