Paper, milk, clouds and white paint share a common property: they are opaque disordered media through which light scatters randomly rather than propagating in a straight path. For very thick and turbid media, indeed, light eventually propagates in a ‘diffusive’ way, i.e. similarly to how tea infuses through hot water. Frequently though, a material is neither perfectly opaque nor transparent…
A guide to the origins, principles, and historical study of light.
he final weekend brought better weather and we went down to our installation to take photos. We were surprised to find the streets were full of people pushing strollers, children, couples, elderly people, crowds from all walks of life. Sydney came outdoors at night in winter and did so with a vengeance. Building on this early success, Vivid Sydney went on to become a major light festival (owned…