Although there are many types of optical illusions, when you are able to combine one with a science experiment, the effects can truly be amazing. One of those experiments that turns into a rather interesting optical illusion uses sound to manipulate objects in ways that you may not have considered possible. Viewing this is not only pleasing to the eye, it also teaches you something about the world around us that you may not have known before. When we hear a sound, there is more going on than just hearing the noise. Sound is actually a vibration and it travels [More]