Our experience of colour is a based on the physics of light, but Andrew Han’’s National Measurement Institute and is past Chairman of the Colour Group of Great Britain. This talk was filmed in the Ri on 19 March 2018. --- Thank you for our Patreon supporters who help us make more videos like this: Ashok Bommisetti, Greg Nagel, Lester Su, Rebecca Pan and Will Knott. --- The Ri is on Patreon: https://www.patreon.com/TheRoyalInsti... and Twitter: http://twitter.com/ri_science and Facebook: http://www.facebook.com/royalinstitution and Tumblr: http://ri-science.tumblr.com/ Our editorial policy: http://www.rigb.org/home/editorial-po... Subscribe for the latest science videos: http://bit.ly/RiNewsletter