Unfolded Physics on Instagram: "This is a practical demonstration of the moiré principle, an interference effect that appears when two repeating patterns overlap with slightly different spacing or timing, producing a larger, slower pattern that is not physically present in either one. In this clip, the ruler’s edge and fine surface details become a fast moving, repeating pattern as it vibrates. In shadow, the lighting is effectively more directional and higher contrast at the boundary, so small

Liquid Light Lab on Instagram: "Demonstration of Moire patterns and video mixing.. Moire patterns are printed on transparency film and placed under the camera, and mixed in with a plate of liquids under another camera. Moire patterns occur when two different patterns interfere with each other, creating a secondary pattern where the lines intersect. I currently have high quality Moire Transparency patterns up at LiquidlIghtShop.com (link in bio) along with glass, oils dyes, and other tools). Thes