Remember the silent caterpillar drive from the movie The Hunt for Red October? The caterpillar drive was a fictional magnetohydrodynamic propulsion system. Magnetohydrodynamic (MHD) propulsion is a means of using...
During World War II, GIs in the field built really amazing simple radios to listen to. These were made with materials that they could get their hands on and were small enough to carry around in a big pocket. You can...
This weekend, get some PVC and build a human powered catapult. Bre Pettis joins forces with Bill Gurstelle, seige weapon builder extraordinaire! This is a great student project for those who are interested in...
As a consequence of the time-bandwidth uncertainty principle, ultra short laser pulses carry significant bandwidth. If the spectral components that fall under the bandwidth of the laser pulse are time coincident, the...
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