Larry Kagan

Here is an artist whose works are arranged objects in 3D space to create recognizable 2D shadows.

He uses steel, light and the resulting shadows to make pieces of art. Except rather than just cutting a single solid 2D shape out of metal and projecting a light onto it, he creates abstract lighty & airy, 3D sculptures that only reveal what they are once the light is turned on. http://www.arts.rpi.edu/~kagan/

Shadow and Reflection Images

Theory of Morning, Day and Night Shadow

b = Morning sun c = Morning shadow
b1 = Noon sun c1 = Noon shadow
b2 = Afternoon sun c2 = Afternoon shadow



In the moment of the noon, the shortest shadow is produced and that shadow invariably points to the geographical North in that hemisphere (see fig. 2) - with the exception of a post that intersectes the ecliptic, where at noon there will be no shadow at all.

Jean Nouvel Glimmering Surface Architecture

The fragmented layout of the building is a feature that more of his works have, and his fascination with glimmering surfaces is apparent. This was showcase at the Louvre Museum in Abu Dhabi

Trash Shadow

This is an interesting art project by Tim Nobel and Sue Webster who took piles of trash and make art into them...

but sometimes the art isn't apparent until you see it in a different light.

shadows

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 farther the distance from the object blocking the light to the surface of projection, the larger the silhouette (they are considered proportional). Also, if the object is moving, the shadow cast by the object will project an image with dimensions (length) expanding proportionally faster than the object's own length of movement. The increase of size and movement is also true if the distance between the object of interference and the light source are closer. This, however, does not mean the shadow may move faster than light, even when projected at vast distances, such as light years. The loss of light, which projects the shadow, will move towards the surface of projection at light speed.

The projected shadow may appear to have moved faster than the speed of light, but there is no actual physical manifestation moving upon the surface. The misconception is that the edge of a shadow "moves" along a wall, when in actuality the increase of a shadow's length is part of a new projection, which will propagate at the speed of light from the object of interference. Since there is no actual communication between points in a shadow (except for reflection or interference of light, at the speed of light), a shadow that projects over a surface of large distances (light years) cannot give information between those distances with the shadow's edge.[2