Did you know that people started doing optical illusions in 5 BC in ancient Greece? They used it in architecture and art. Did you know a rainbow is an optical illusion?
The most interesting one I made was the one Nanogirl did. I used a glass of water and a picture that I drew of an arrow. I put the paper behind the glass and it changed direction. Do you know why this happens? I'll tell you. The light changes direction each time it goes through the glass. This is called refraction and it happens because light slows down when it is behind and speeds up when it leaves the front of the glass. This is sort of hard to explain.
I really enjoyed making the optical illusions because it made me feel like a magician. It was quite easy and I did not find anything tricky. I especially liked doing the pink paper one and tricking my Mum and Aunty with it.
Thank you for reading my blog. Here are my Illusions on some slides:
