Why does a nearly closed door project this perfectly spaced striped pattern onto my floor?
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I noticed this while almost closing my front door at night. There is a window with evenly spaced bars/slats directly in front of the door. When the door is almost closed, this sharp striped pattern appears on the floor. The lines are evenly spaced and surprisingly crisp. Opening the door wider makes the effect change or disappear. Is this a camera obscura/pinhole projection of the window through the narrow gap between the door and the frame, or is another optical effect responsible? Why are the stripes so uniform? submitted by /u/Oddly_Satisfying7382 |
