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A shadow is a dark area on a surface where light from a light source is blocked by an object. In contrast, shade occupies the three-dimensional volume behind an object with light in front of it. The cross section of a shadow is a two-dimensional silhouette, or a reverse projection of the object blocking the light.
The antumbra (from the Latin ante "before" and umbra "shadow") is the region from which the occluding body appears entirely within the disc of the light source. An observer in this region experiences an annular eclipse , in which a bright ring is visible around the eclipsing body.
The shadow can be thought of as the blind spot of the psyche. [6] The repression of one's id, while maladaptive, prevents shadow integration, the union of id and ego. [7] [8] While they are regarded as differing on their theories of the function of repression of id in civilization, Sigmund Freud and Carl Jung coalesced at Platonism, wherein id rejects the nomos.
A shadow person (also known as a shadow figure or black mass) is the perception of shadow as a living species, humanoid figure, sometimes interpreted as the presence of a spirit or other entity by believers in the paranormal or supernatural.
The shadow is a representation of the personal unconscious as a whole and usually embodies the compensating values to those held by the conscious personality. It is the hidden, suppressed side of the persona. The shadow's characteristics are in direct opposition to the persona. [31]
The shadow of an eclipse on Earth as seen from space An eclipse is an astronomical event which occurs when an astronomical object or spacecraft is temporarily obscured, by passing into the shadow of another body or by having another body pass between it and the viewer.
The appearance of the shadow depends on the lighting instrument. For example, Fresnel lights can be focused such that their shadows can be "cut" with crisp shadows. That is, the shadows produced will have 'harder' edges with less transition between illumination and shadow. The focused light will produce harder-edged shadows.
A seismic shadow zone is an area of the Earth's surface where seismographs cannot detect direct P waves and/or S waves from an earthquake. This is due to liquid layers or structures within the Earth's surface.