Some Favorites on QM

apparently by the same
Todd Stedl at the University of Washington writes, "In 1690 Christian Huygens theorized that light was composed of waves, while in 1704 Isaac Newton explained that light was made of tiny particles.

Many nice pictures and good descriptions such as:

The Heisenberg uncertainty principle

It's like rolling the cue ball across a billiard table and trying to discover where it is going by bouncing the 8-ball off of it; by making the measurement with the 8-ball you have certainly altered the course of the cue ball. You may have discovered where the cue ball was, but now have no idea of where it is going (because you were measuring with the 8-ball instead of actually looking at the table).

Other sites to explore

is Stanford Encyclopedia of Philosophy on the
The Uncertainty Principle

Woops! I found a beautiful applet out of Oxford illustrates Heisenberg's (position-momentum) Uncertainty Principle in quantum mechanics with the following Google Search.

Ah! Here it is.