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Why is the darkest part of a cast shadow generally near the contact point?

Answer and explanation

Correct answer: The least light reaches that area

The governing concept is contact shadow and occlusion. Where the object touches or nearly touches the surface, very little direct or reflected light can enter the narrow gap, so that region receives the least illumination and appears darkest. As the cast shadow moves away, more surrounding light can enter and the value usually becomes softer and lighter. Therefore, option C is correct. Paper colour, pencil softness, and contour thickness are drawing conditions, not the physical reason for the dark contact area.

Related tags

Pencil ShadingContact ShadowDarkest ValueLightDrawing BasicsArt EducationClass 9 Mcq

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