Visual curiosities and mathematical paradoxes by Linda Becerra and Ron Barnes
Optical illusions are pictures that play tricks on our eyes and baffle our perception. They are not the result of faulty vision. Depending on light, viewing angle, or the way the picture is drawn, we may see things that aren’t there – and often don’t see what’s right under our nose. These tricks of the eye and mind have been part of human experience since the beginning of history. The ancient Greeks made use of optical illusions to perfect the appearance of their great temples. In the Middle Ages, misplaced perspective was occasionally incorporated into paintings for practical reasons. In more recent times, many more illusions have been created and implemented in the graphic arts.
- What Color is this Dress?
- How Many Black Dots Do You Count?
- Pyramid Illusion
- Concentric Gray Circles or Spirals?
- Slanted Squares, or horizontal and vertical edges?
- Curved Lines, or Straight Lines?
- 3D Handprint optical illusion
- Which orange circle is larger?
- Are the two long lines the same length?
- 3D or Not 3D?
- Magritte’s Euclidean Walks (1955)
- The Grand Illusion
- The Leaning Tower Illusion
- Can You Find a 5-Point Star?
- Can You Spot the Panda?
- Can You Spot the Cat?