Science Projects And Inventions

YOU  NEED

• A shoe box
• Plastic  tracing  paper

Take a shoe box, with black colour, paint the insides and the lid black. Cut out a square window on one and paste tracing paper over the opening thus a screen. On the opposite side of the box, make a small hole. Place a small object on the table, shine the light of a lamp on it. Point the viewer towards the object: Light rays from the object travel in straight lines and intersect each other as they pass through the viewer. If you look at the screen on the other side you will see an upside down image of the object.