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Why is the contact shadow darkest directly beneath an object?

Answer and explanation

Correct answer: The least light reaches that area

The governing concept is occlusion at the contact point. Directly beneath an object, the narrow gap between the object and the supporting surface receives very little direct or reflected light, so the value becomes darkest there. Therefore, option A is correct. The paper does not become thicker, the object’s colour does not suddenly change, and a pencil cannot darken by itself. The contact shadow also helps make the object appear firmly grounded.

Related tags

Contact ShadowGroundingOcclusionDark ValuePencil ShadingDrawing BasicsArt EducationClass 9 Mcq

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