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What does a sudden change from light to shadow indicate on an angular object?

Answer and explanation

Correct answer: There is a sharp turn between two planes

The governing concept is the relationship between surface planes and tonal transitions. On an angular object, a sharp corner changes the direction of the surface abruptly, so the light strikes the neighbouring plane differently and the value can change suddenly. Thus option C is correct. A rounded surface normally produces a gradual transition, while transparency and the distance of a cast shadow do not explain this edge-to-edge change on the object itself.

Related tags

Pencil ShadingAngular FormPlane ChangeHard TransitionDrawing BasicsArt EducationClass 9 Mcq

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