David Alciatore, PhD ("Dr. Dave") ILLUSTRATED PRINCIPLES "Coriolis was brilliant ... but he didn't have a high-speed camera Summary: David Alciatore, PhD ("Dr. Dave") ILLUSTRATED PRINCIPLES "Coriolis was brilliant ... but he didn't have a high-speed camera ­ Part III: Cue Ball Paths are Like Satellite Dishes" Note: Supporting narrated video (NV) demonstrations, high-speed video (HSV) clips, and technical proofs (TP) can be accessed and viewed online at billiards.colostate.edu. The reference numbers used in the article (e.g., NV 4.20) help you locate the resources on the website. This is the third article in a series I am writing about the pool physics book written by the famous mathematician and physicists Coriolis in 1835. In last month's article, I described some high-speed camera work I've done and showed some examples that relate to some of Coriolis' conclusions. Over the next few months, I will look at Coriolis' conclusions in more detail and explain when they do and don't apply. As with all of my past articles, my July '05 article summarizing Coriolis' conclusions can be viewed on my website. Principle 23 summarizes one of Coriolis' conclusions, which states that the cue ball's path curves in the shape of a parabola after hitting an object ball with follow or draw (see Diagram 1). Interestingly, a parabolic curve is the same shape used to make radio telescopes, satellite TV dishes, and headlight mirrors. As with all of Coriolis' work, he backed up all of his results with rigorous physics and mathematical analysis. For the sadistic readers out there with math and physics backgrounds, you can check out the nitty-gritty details of Principle 23 at TP A.4. There I present and illustrate the derivation with modern terminology and techniques and show plots of Collections: Engineering