Shadows are dark areas created when light from a source is blocked by an opaque object. There are three types of shadows: umbra, penumbra, and antumbra. Umbra is the darkest area of the shadow cast by a point light source. Penumbra is the partial shadow around the umbra that occurs when the light source has a larger surface area. Antumbra is the V-shaped end of the umbra that appears when the light source is larger than the object. Shadows can be used in photography to add contrast and drama, focus attention on important details, and reveal texture and form by magnifying irregularities in shapes and terrain. Photographers can enhance images using shadows by making