I seem to remember seeing something online about this. They take a clear jug, and put a hole in the side near the bottom, then fill it with water. Of course the water drains out in a slight arch out one side. They took a laser, pointed it thru the opposite side of the jug towards the hole, and the laser stays within the water draining. Therefore making the light actually do a 90 degree turn, due to angle of incidence I think? Works the same as the fiber optic cables. Light cant escape due to the angles and such.
Wondering if it'd be possible to transfer a great deal of infrared from something such as a fresnel lense. Once a tracking system was worked out. By constantly pumping water into the jug, you could have a consistent beam of infrared pointed downwards. Would this work you think?
Sorry, I don't get the point? At all. Nothing topical for the board.