red car goes black

You will need:- 1 Strong Torch and rubber band.- Green Cellophane- 1 Red object e.g. car, tomato, hat- A very dark room Instructions1. Place the green cellophane over the torch and secure with a rubber band.2. Darken the room and shine the green light on the red object4. What colour do you see? Try different coloured objects and lights. Is the effect always the same?