The first experimenters who tried to measure the speed of light concluded that light speed was infinite. Their equipment was unequal to the task of measuring something so very fast. In v = d/t, the t was too small no matter how big they made the d.
Similarly if you were to take the ratio of effective presentations (PowerPoints) you've seen to the total number of presentations you've sen, you would be forgiven if you concluded that "effective PowerPoint" was an oxymoron. (The "effective" number too small and the "total" number total too large.)
Effective presentations do exist. Garr Reynolds hosts a weblog devoted to Presentation Zen. He offers fundamental principles for success that can be found here.
Saturday, December 20, 2008
Sunday, December 14, 2008
Thermal physics in slow motion
Here's a generous helping of new high-speed video from my trusty Casio EX-F1. We're into thermal physics right now, so it was time to record flame, steam, and the Leidenfrost Effect as Paul Robinson demonstrated at PTSOS.
As always, these are QuickTime clips (for better playback control and ease of downloading).
Enjoy the clips here.
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