Nice Sir. On 6 December 2014 at 09:04, Ambar Chatterjee <drambar@xxxxxxxxx> wrote: > Dear Jyotiriling, > > Can we do simple pendulum experiments to study damping? Indeed yes. I have > started a project in BSc physics lab where we attach a magnet (supplied in > Expeyes kit) to the pendulum already being used by students, such as > torsion pendulum, compound pendulum and simple pendulum. We now place one > of the 3000T coils supplied in the kit in such a way that the magnet enters > inside the coils and leaves at every oscillation. So long as there are > several oscillations within 3 sec, we can produce an oscilloscope trace > that shows several cycles of oscillations. See Fig 6.2 on page 84 of the > expEYES manual. Analysis of this trace allows calculation of the damping > factor gamma as in exp(-gamma*t). To overcome the 3 sec limitation of > oscilloscope trace, we can use a python script with get_voltage and PC > clock. We can also use the LED and photo-sensor method as shown in Fig 4.5 > (page 62). > > By the way, it is also nice to do the complete Lissajous figures > experiment (not just ellipse) by utilizing the 2 audio outputs (stereo > output) of a standard PC/laptop. There is free software available to > generate pure frequencies on these two channels, and these can be varied as > desired to produce nice Lissajous figures. > > Best regards > Ambar Chatterjee > > > On Sat, Dec 6, 2014 at 8:33 AM, Jyotirling Pune <jyotirlingpune@xxxxxxxxx> > wrote: > >> >> > -- Yours K. Padma Prasad <https://sites.google.com/site/homepadmaprasad/home> ****** *K. Padma Prasad* *Assistant Professor in PG Physics * *JSS College for Arts Commerce and Science* *Mysore 570 025* *Karnataka, India (இந்தியா)* * http://www.jsscacs.edu.in/physics-pg <http://www.jsscacs.edu.in/physics-pg>*