Hi Jim, Do you mean thin film interference? https://en.m.wikipedia.org/wiki/Thin-film_interference There are many ways to measure wavelength though, especially if you are talking about monochromatic light. You can use cds/dvds/Blu-ray discs to do something like the thin slit experiment, and another option is to use polarizing filters and measure birefringence: https://physlab.lums.edu.pk/images/3/30/Cellophane2.pdf —Brad
On Apr 11, 2020, at 11:18 AM, James Propp <jamespropp@gmail.com> wrote:
I once read about an experiment where you can measure the wavelength of light using a drop of oil and a pond. The idea is that the oil will disperse into a uniform film whose thickness (calculable as the volume of the drop divided by the surface area of the pond) is close to the frequency of visible light, and then you can observe chromatic effects. Can anyone provide a reference? I did a Google search but couldn't find the thing I recall reading.
Thanks,
Jim Propp _______________________________________________ math-fun mailing list math-fun@mailman.xmission.com https://mailman.xmission.com/cgi-bin/mailman/listinfo/math-fun