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.