[phoenix-project] Re: Can we do experiments like simple pendulum oscillations to study dumping factor.
- From: "Md. Abdul Khan" <drakhan.rsm.phys@xxxxxxxxx>
- To: Ambar Chatterjee <drambar@xxxxxxxxx>
- Date: Sat, 6 Dec 2014 15:17:48 +0530
nice job
Dr. A Khan
*________________*
*Dr Md Abdul Khan*
Assistant Professor, Department of Physics,
Aliah University
IIA/27, New Town, Kolkata-700156, India.
Nearest Land Mark: Ecospace
Mob:+91 94348 16483
On Sat, Dec 6, 2014 at 9:04 AM, 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:
>
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>
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