SHEILA TERRY / SCIENCE PHOTO LIBRARY SHEILA TERRY / SCIENCE PHOTO LIBRARY
Three Leonardo da Vinci sketches to illustrate linear perspective and light and shade.The upper diagram shows the light from three luminous bodies being projected on to a surface after passing through a small aperture. In the lower diagrams, Leonardo da vinci shows how shadowless lighting is produced when the eye is positioned between the luminous source and the objects being illuminated.
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