The double shadow
Professor Threestone loves to play the shadow theatre. Therefore, he wants to invent a machine in order to create more than one shadow with only one source of light.
Can you help him?
Is it possible to build a machine like that? If so, what material is crucial and how does it work?
You can find hints behind the buttons on the right which can be helpful for solving the task. Choose one of them! You can work on as many hints as you like to.
Helpful hints
A candle light experiment
We are trying to find the answer with an experiment.
We are trying to find the answer with an experiment.
It's not that easy...
...if you take it twice!
...if you take it twice!
What if...
Lily and Fred are thinking about the development of shadows.
Lily and Fred are thinking about the development of shadows.
Position of a shadow
Shadows are created where no light can hit. We determine the exact position of the shadow with a graph.
Shadows are created where no light can hit. We determine the exact position of the shadow with a graph.
This could be useful...
You can find important physics background knowledge in the toolbox.
You can find important physics background knowledge in the toolbox.
"I have got it!"...
...and I want to answer the question.
...and I want to answer the question.