TLF ID L2041
Investigate whether light rays always travel in straight lines. Rotate circular walls, each of which has a single opening. Position the walls so that light from a central bulb can be seen by a person outside the walls. Make shadows by placing a range of objects between a light source and a screen. Position shapes to make a shadow animal. Notice that shadows are larger when more light is blocked. This learning object is a combination of two objects in a series of six objects.