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A very soft boundary between a lit plane and a shadow plane may indicate what kind of surface?

Answer and explanation

Correct answer: A gradually turning curved surface

The governing concept is the relationship between surface form and tonal transition. On a gradually curved surface, the surface normal changes continuously, so the amount of received light also changes gradually; the boundary between light and shadow therefore appears soft. Option C is correct. A sharp cube plane usually gives a clearer change, while a mirror concerns reflection and flat paper does not explain a rounded transition.

Related tags

Object ObservationSoft TransitionCurved SurfaceToneDrawing BasicsArt EducationClass 9 Mcq

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