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Shadows are ubiquitous, but often go unnoticed. Shadows are important historically, for they provided early evidence that light travels in straight lines. Humans constantly, but unconsciously, use shadows to judge the shape of objects in their environment. Because shadows reveal much about an object's extension in space, they are often used to heighten the illusion of depth in a painting.
In a darkened room, students are provided with a camera flash and a large 24inch sheet of heavy duty glow in the dark vinyl sheet. The slow emission of stored energy in the form of visible light is called phosphorescence.
Kit includes a large 24 inch square of Glow in the Dark vinyl sheet with an adhesive backing, a powerful camera flash unit and teachers notes on student activities.