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Why do two identical grey values appear different against different backgrounds?

Answer and explanation

Correct answer: Because of value relativity

The governing concept is value relativity, also called simultaneous contrast. Human vision judges a grey in relation to surrounding light and dark areas, so the same physical value may appear lighter beside a dark background and darker beside a light one. A is correct. The pencil grade and paper size have not changed, and light is not necessarily opposite; the perceived difference comes from context.

Related tags

Value RelativitySimultaneous ContrastTonal JudgementSketchingPencil ShadingDrawing BasicsArt EducationClass 9 Mcq

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