The
clear glass wheel, containing two hollow spheres embedded in the rim,
is balanced on a pivoting axle>
|
Each
sphere is partly filled with liquid, as well as a thin black metal
sheet> |
The
spheres are connected by a hollow glass tube along the lower rim> |
Light
from the halogen bulbs impinges on the black sheet on the lower sphere,
heating the air> |
The
warm air pushes liquid from the lower sphere to the upper, causing
the seesaw to become unbalanced> |
The
upper sphere rotates to the bottom, only to be illuminated by the
other bulb> |
The
cycle repeats. |
