4 4.2 Progress task Problem solving task The task Part 1 The picture above shows a prism kaleidoscope. When the user looks through it, they see multiple images. The kaleidoscope works through refraction. The picture below shows one small section through the lens of the kaleidoscope. Explain why this happens Part 2 © Oxford University Press 2017 http://www.oxfordsecondary.co.uk/acknowledgements This resource sheet may have been changed from the original. 4 4.2 Progress task A theatre director was watching the dress rehearsal of a play. He noticed that the characters all looked like they were wearing the wrong costumes when they were under different lights. He wrote down what he saw. Character Red light Yellow light Blue light red yellow black Prince charming black black blue Ugly sisters black green blue Witch black black black red yellow blue Cinderella Fairy godmother Determine what colour costume each character was wearing if the director had looked at them in white light. As an extension, can you work out how you could have a written message that said one thing when looked at in white light, and another thing when looked at in red light? © Oxford University Press 2017 http://www.oxfordsecondary.co.uk/acknowledgements This resource sheet may have been changed from the original.
