DIY physics enthusiast here doing a double slit eraser experiment at home with a laser pointer, double slit diaphragm, and few linear polarizers (horizontal at one slit, vertical at the other, +/-45 degrees for the eraser).
When I angle the eraser polarizer at -45 degrees or +45 degrees I get the interference pattern back, however the interference patterns (light/dark bands) are completely out of phase for -45 vs +45. How come that happens?
+45 = | | | | | |
-45 = | | | | | |
P.S. My physics "knowledge" is all from the University of YouTube, so you may have to explain it to me like I'm 5. :)
Edit: Here is a link to a video I uploaded showing the setup and shifting interference pattern I am talking about: https://www.youtube.com/watch?v=1rN3iLcbb2M