How do light sources affect what you see?
What will be an ideal response?
When we look at an object, we see a range of tone, according to how much light strikes a particular surface. Because light most often comes from one main source, such as the sun or a lamp in the room, the surfaces of an object toward the light source reflect the most light. Surfaces at an angle to, or away from, the light source do not reflect as much light, so they appear darker. Even when there are several sources of light, one usually dominates the object we are viewing because of the intensity of that light or its proximity to the object we are looking at.
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