An illusion is like when you see a picture of a magic trick. It looks like the magician is pulling a rabbit out of an empty hat, but really, they are just very good at hiding the rabbit. Your eyes see one thing, but something different is happening.
Another way to think about an illusion is like a rainbow. When you see a rainbow in the sky, it looks like a big colorful arch. But if you try to walk to the rainbow, it will always seem far away because it’s really just light playing tricks with water droplets.
Illusions are also like when you see a stick in the water. The stick looks bent or broken where it enters the water, but when you pull it out, it’s straight. This happens because the light bends in the water, making your eyes think the stick is bent.
So, an illusion is when your eyes or mind see something in a special way that isn’t really true. It’s a fun way that our brains can be tricked into seeing things differently than they really are.