These scientists attributed this experience to what they called persistence of vision, whereby the eye retains a visual image for a fraction of a second after the source has been removed. The eye's retention of a visual image, now known as positive afterimage, has long been considered a founding principle of motion pictures, even though its relationship to the perception of motion is still not well understood. Today movies are a popular and well documented major contemporary art form. Sundance Film Festival Information and archives presented by the Sundance Greatest Films Specializing in Detailed Overviews of Classic Hollywood and American Films. American Film Institute AFI celebrates moviemaking and cinema - offering film classes and workshops too.
Architecture is to building as literature is to the printed word.
Commoditie, Firmenes, and Delight. More prosaically, one would say today that architecture must satisfy its intended uses, must be technically sound, and must convey aesthetic meaning. But the best buildings are often so well constructed that they outlast their original use. They then survive not only as beautiful objects, but as documents of the history of cultures, achievements in architecture that testify to the nature of the society that produced them. These achievements are never wholly the work of individuals.