¶ Tetrahedron: Inside-Outing of Tetrahedron (3)
← Tetrahedron (2) | Tetrahedron Inside-out Tetrahedron Begins to Grow →
Index Entry
Tetrahedron: Inside-Outing of Tetrahedron:
“This is an interesting model of a tetrahedron which you could make yourself by taking a heavy steel rod triangle, take three rubber bands, run them from the three vertexes into the center of gravity of the triangle and tie them together. Take ahold of the three rubber bands where they come together at the center of gravity and yank it suddenly like this, and the inertia of the steel triangle will make the rubber bands stretch and the triangle becomes a tetrahedron-- but then they begin to contract and the triangle lifts. You will be able to take such a triangle hanging in the air by the three stretched rubber bands and you can plunge your hand through the triangle, and pull it back, and you can have the triangle oscillating by pulling your hand back and forth and making a positive and negative tetrahedron. As a tetrahedron becomes positive or negative, pumping its vertex through the opposite face (the case I had before was pumping the opposite faces through the vertexes, and I just wanted to get the idea across that you can do it either way.) This kind of an oscillating pump is typical of some of the atom behaviors and this is what they call one of the prime atom clocks. It is just such an oscillation between a positive and negative tetrahedron.”
