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Direct linkHughes, S. W. – Physics Education, 2009
What colour is a shadow? Black, grey, or some other colour? This article describes how to use a digital camera to test the hypothesis that a shadow under a clear blue sky has a blue tint. A white sheet of A4 paper was photographed in full sunlight and in shadow under a clear blue sky. The images were analysed using a shareware program called…
Descriptors: Photography, Light, Hypothesis Testing, Science Instruction
