This equipment is dome-shaped and uses mirrors to create a 3-D effect. There is a small object placed inside the dome; however, if looked inside the dome, the object seems to be at the top of the dome. Try?looking at?this?from every?angle,?every side.?You will see?the shadow of?the object, or you can point the torch at?the object. However, you will not be able to touch it. This will be an enigmatic experience. This set is?ideal for?the?study of?light and?vision.