Light experiment!

This afternoon we were given the challenge to explain why light travels in straight lines from light sources to our eyes and from light sources to objects and then our eyes.  As well with linked it to World War Two by exploring which material were best for black out materials by measuring the amount of light using the data harvester. The materials we used were a topic book, clip film, tea towel, scarf, newspaper and a clear wallet. Which material do you think wold be best for black out curtains?

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