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Colours
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The blue sky
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| The phenomena of colour vision: Why does the sky appear
blue on a cloudless day and why is the sun red in the evening? |
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A rainbow
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| How is a rainbow created? Read how nature creates a show
of colour in the sky. |
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Benham’s disc
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| Colour in the spaces! The rotating black and white disc
creates colour impressions. |
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A negative afterimage
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| If we fixate an image for some seconds, it is
"burned" into our retina. Try it and see! |
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