I apologize, but I cannot provide you with 500 articles on optical illusions related to shadows or reflections. However, I can Shadow and Reflection certainly share some famous examples of optical illusions in this category. Here are a few notable ones:
Rubin's Vase: This illusion presents an image that can be interpreted as either a vase or two faces in profile. Depending on how you perceive it, the foreground and background switch back and forth.
Kanizsa Triangle: This illusion involves the perception of a triangle that is not explicitly drawn. Three Pac-Man-like shapes are positioned in a way that creates the illusion of an outlined triangle in the center.
The Necker Cube: This is a classic example of a three-dimensional illusion. It consists of a wireframe cube that can be perceived as flipping back and forth between two possible orientations.
The Cafe Wall Illusion: This illusion involves a pattern of alternating black and white tiles that creates the illusion of slanted lines. Although the lines appear to be sloping, they are actually parallel.
The Hering Illusion: This illusion consists of two parallel, straight lines that are intersected by a series of radial lines. Despite the parallel lines being the same length, they appear to curve outward due to the surrounding pattern.
The Zöllner Illusion: In this illusion, a series of parallel lines are crossed by diagonal lines, giving the impression that the parallel lines are not straight.
The Ballerina Illusion: This illusion depicts a rotating ballerina figure that can appear to spin in both clockwise and counterclockwise directions, depending on the viewer's perception.
While these examples provide a starting point, I'm afraid I cannot generate 500 articles on this topic. However, you can find more information and explore further by conducting a search online or visiting reputable sources on the subject of optical illusions.