The rare property of pumpkin seed oil - dichromatism
Steve Mould 5:53
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This liquid changes colour from green to red depending on thickness. It works because of it's unusual absorption spectrum but also becasue of the way our eyes perceive light.
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Visit my blog here: http://stevemould.com
Follow me on twitter here: http://twitter.com/moulds
Buy nerdy maths things here: http://mathsgear.co.uk
Category (YouTube): Science & Technology
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