Maximum overlap waveforms spreadsheet file is now in Photons module

As promised, the spreadsheet mentioned in the visual podcast on superposition is now in Webcourses. The spreadsheet is called max_overlap.xls, and it has two access links.

You can change the snapshot time from t=5 sec to any other time, and the waveform will re-calculate and re-draw itself. Pretty slick. Try it out and see if it makes sense to you. Look in the "Photons, electromagnetic waves and energy" module.