Jim Al-Khalili’s explanation of the double slit experiment sparked lots of questions: Jon has the an’’s explanation here: https://youtu.be/A9tKncAdlHQ And watch his full lecture here: http://www.youtube.com/watch?v=wwgQVZju1ZM Subscribe for regular science videos: http://bit.ly/RiSubscRibe The Ri is on 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-policy Subscribe for the latest science videos: http://bit.ly/RiNewsletter