George Porter shows what happens on a sunbeam’s journey from the sun to Earth, with some help from John Tyndall’s blue sky tube. Watch the full first lecture of the series: https://www.rigb.org/christmas-lectures/watch/1976/the-natural-history-of-a-sunbeam/first-light?utm_source=youtube&utm_medium=social&utm_term=description George Porter gave the 1976 Christmas Lectures "The Natural History Of A Sunbeam" about the power of light, from the role it plays in stimulating life to supplying energy to our homes. The first lecture "First Light", where this clip is from, sees George explaining how colour is created through light ‘scattering’ which John Tyndall discovered.