tag:techtv.mit.edu,:Array/186732840 2007-12-27 14:43:37 -0500 Doc Edgerton Films Watch this slideshow of several photographs of a bullet going through various objects such as apples, cards, etc. These were captured by Doc Edgerton using his stroboscopic photography process. 127 tag:techtv.mit.edu,:Array/186375920 2007-10-10 16:19:18 -0400 MIT News Office <p>Using a stroboscopic imaging system developed in MIT Professor Dennis Freeman's lab, Freeman's team obtained this video of wave motion along the ear's tectorial membrane (at top, the actual video showing nanometer-scale displacements, and at bottom, the same video, motion magnified (Liu et al., 2005) to make the motion more apparent). </p><p>Credit: Ghaffari, Aranyosi, and Freeman, MIT</p><p>More: <a href="http://web.mit.edu/newsoffice/2007/hearing-1010.html">MIT finds new hearing mechanism</a></p> 19 tag:techtv.mit.edu,:Array/186169320 2009-07-23 09:30:37 -0400 Blended Learning Open Source Science or Math Studies (BLOSSOMS) Video Summary: This module is about a particular effect of the frequency, which is the stroboscopic effect. The lesson discusses and demonstrates low frequency phenomena - less than 16 Hz - that can usually be observed clearly by the human eye, as well as high frequency phenomena - more than 25 Hz - that are difficult for the human eye to catch. This video also explores and demonstrates how high frequency phenomena can be observed by freezing the fast moving phenomenon using a device called a stroboscope. The only prerequisite for this video is that students understand the definition of the frequency of a periodic phenomenon. The video segments take up 17 minutes, so the total length of the lesson would depend on the amount of time spent during the in-class breaks. This lesson could certainly be completed during a 50-60-minute class period. Materials needed for this lesson include: a piece of paper or cardboard; a pen or a pencil; adhesive tape; a toothpick or a small stick; and a notebook with blank pages. (If available: a function generator, an AC power supply, connecting wires, a LED, a small lamp, a fan or ventilator (with blades), a flashing stroboscope) Examples of in-class activities between segments include discussions of frequency phenomena and the building of simple devices that demonstrate those phenomena. 1116 tag:techtv.mit.edu,:Array/186116360 2009-11-05 15:42:29 -0500 Blended Learning Open Source Science or Math Studies (BLOSSOMS) This module is about a particular effect of the frequency, which is the stroboscopic effect. The lesson discusses and demonstrates low frequency phenomena - less than 16 Hz - that can usually be observed clearly by the human eye, as well as high frequency phenomena - more than 25 Hz - that are difficult for the human eye to catch. 1152