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A debate has raged on social media over the colour of a dress which looks different to different people.
In a particular photo it can appear to be white and gold or blue and black.
David Sillito explains the theory behind the phenomenon.
https://www.bbc.com/news/uk-31655236
In a particular photo it can appear to be white and gold or blue and black.
David Sillito explains the theory behind the phenomenon.
https://www.bbc.com/news/uk-31655236