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An element of art, value refers to the visible lightness or darkness of a color. Value is synonymous with luminosity in this context, and can be measured in various units designating electromagnetic radiation. Indeed, the science of optics is a fascinating branch of physics, albeit one to which visual artists typically devote little to no thought.

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Form is one of the seven elements of art. At its most basic, a form is a three-dimensional geometrical figure (i.e.: sphere, cube, cylinder, cone, etc.), as opposed to a shape, which is two-dimensional, or flat.

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Texture, another element of art, is used to describe either the way a three-dimensional work actually feels when touched, or the visual "feel" of a two-dimensional work.

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An element of art, space refers to distances or areas around, between or within components of a piece. Space can be positive (white or light) or negative (black or dark), open orclosed, shallow or deep and two-dimensional or three-dimensional. Sometimes space isn't actually within a piece, but the illusion of it is.

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A shape is one of the seven elements of art. When defining it within the study of art, shape is an enclosed space, the boundaries of which are defined by other elements of art.

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A line is a basic element of art, referring to a continuous mark, made on a surface, by a moving point.

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Color is the that is produced when light, striking an object, is reflected back to the eye.