A shadow is an area where direct light from a light source cannot reach due to obstruction by an object. It occupies all of the space behind an opaque object with light in front of it. The cross section of a shadow is a two-dimensional silhouette, or reverse projection of the object blocking the light. The sun causes many objects to have shadows and at certain times of the day, when the sun is at certain heights, the length of shadows change.

If the shadow resembles a character, consider using silhouette as well.

Categories

• cast_shadow - A shadow that projecting outward from something as if it was blocking a light source. Most shadows are like this.
• drop_shadow - A shadow place near the outline of something in order to give the illusion that it appears in front of the shadow. This is more like a visual effect.

Related tags

• under_shade

See also

• tag group:optics