– Blaise Balas and Benjamin Balas “Transparent Knife Illusion”.
Benjamin Franklin Middle School and North Dakota State University
Author description: This is an illusion in which an ordinary knife looks transparent when it is placed in the middle of the tines of a fork. Even if the knife is reflecting other objects that are nearby, the appearance of the fork still makes the knife itself look like it must be see-through. If you lower the knife into position between the fork’s tines from above, the knife appears to transform from a reflective object to a transparent one.