Three Solids
Three silo-shaped wooden boxes filled with sand hang
down from the ceiling. Columns of sand fall from these boxes through
grids of various shapes (triangle, square, rhomboid). As the sand
falls, the same geometrical patterns are projected onto the columns
by a light projector. The cross-section of falling sand and light
creates 3-dimensional solids: tetrahedron, cube, octahedron —
three of the five possible regular geometrical solids.
The diameter of each solid is approximately 5 cm and the contents
of each box take one and a half hours to fall.
Three Solids, sand, projection, area variable, 1993