Colored shadow

Official website of Olafur Eliasson and his studio: Your uncertain shadow... • Artwork • Studio Olafur Eliasson

Three colored spotlights - red, green and blue - illuminate a white screen. A hand is placed between the screen and the lights, thus casting overlapping shadows on the screen. From left to right, you will observe a yellow, magneta and cyan shadow. The colors red and blue are produced where the shadows overlap. More info about this demonstration is available at The Physics Classroom: www.physicsclassroom.com/Class/light/u12l2e.cfm.

(c) Exploratorium, www.exploratorium.edu

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Last weekend we took the girls to visit the Exploratorium. This was actually our second trip to the Exploratorium, but our first to it's new location at Pier 15. I never got around to posting about our first visit to the Exploratorium last year. The museum itself was great and Ava had a fantastic time with all of the hands on displays, however my day was overshadowed by an over-tired Lola and an incident at the giant bubble making station. Older children had kept pushing Lola out of the way…

Viewed from outside, the work is a great circle located in the ceiling from which white light is spreading in to the room. The moment the viewer enters the circle, the white light will be broken as…