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Re: phasors



I've developed a DOS phasors package which is available through
Physics Academic Software.

You can download an attenuated version of this program to see how it
behaves from my web site --- http://www.rose-hulman.edu/~moloney.


Go to 'Packets Page' then to 'Waves' under Introductory Courses.
Click on the download for 'Wave Interference Simulation'. If you are
in Windows 95, open a dos window and run this, or create a batch file
to call it up, and then double click on the batch file. (Don't
directly double-click on it in windows!!).


The phasor simulation has a tutorial part which shows a single
phasor, and two phasors, where amplitudes and phase angles can be
changed via sliders. You can run animations of these to observe the
motion of phasors and 'output' over one cycle. You can also explore
two source interference by moving the mouse. The mouse moves through
a grayscale intensity plot, and as it moves, you observe the path
difference on a bar graph, and also the two-phasor addition going on
'on the fly'.

The rest of the phasor simulation is disconnected from the freebie
version. This includes N sources in a line, with simulations of a
single slit and a grating. The circular aperture is dealt with via
phasors in a way you may possibly find surprising. Both a side view
and a front view of the intensity pattern are available. In all
cases, sliders adjust parameters, and in all cases as you move the
mouse around, phasor addition changes on the fly, over a background
grayscale intensity plot. There is some more fancy stuff, too, like
resolving power of gratings.

--

Mike

===============================================================
Mike Moloney
moloney@nextwork.rose-hulman.edu
Dept of Physics & Applied Optics (812) 877 8302
Rose-Hulman Institute of Technology Terre Haute, IN 47803
http://www.rose-hulman.edu/~moloney