I contracted for non-invasive inspection with ARDEC back in 2001. We have the technology to scan these bullets at an extremely fast rate (1000+ bullets/sec) using Photoelectric Effect and Compton Scattering and single out the bad powder using electron density and Z effecitive. We can definitely help the insurgence avoid these traps if politics weren't in the way.

My favourite soundbite:

"No one can predict what new applications will be born of basic research: new treatments in our hospitals, or new sources of efficient energy; new building materials; new kinds of crops more resistant to heat and to drought.

It was basic research in the photoelectric field -- in the photoelectric effect that would one day lead to solar panels. It was basic research in physics that would eventually produce the CAT scan. The calculations of today's GPS satellites are based on the equations that Einstein put to paper more than a century ago."

He gets it.

Quick explanation of how I think it works:

Initially, a very small electrical potential difference between the buckets is caused by the photoelectric effect of the light shining on C. This "seed" potential difference is multiplied thousands of times by the following chain reaction:

A is positively charged and B is negatively charged. Therefore more electrons in the source water will exit at the A dripper, so the water falling through A will be negatively charged and the water falling through B will be positively charged. The negatively charged water from A falls to D which is connected to B and reinforces B's negative charge. The positively charged water from B falls to C which is connected to A and reinforces A's positive charge.

The energy for all of this must come from the gravitational potential of the source water. Gravity pushes the charged water against the electrical potential gradients from A to D and from B to C

I like what it did cover, and how it did it, but was a little let-down that it didn't touch on the other side of wave-particle duality, the photoelectric effect.