Take the tour ×  Is it possible to design a physical experiment
that shows that a time limited signal, such as a rectangular
pulse is composed of infinite continuous sine/cosine waves?
share|improve this question this might give you ideas of how to
go about it en.wikipedia.org/wiki/Fourier_series . For a single
pulse see en.wikipedia.org/wiki/Rectangular_function . One could
build electronic circuits which would reproduce the effect on a
screen –  anna v Feb 16 at 8:21 I have to say that as described
you are talking about a mathematical fact. It not something that
is amenable to experimental proof or disproof, it simply is. The
experiment asks if the signal does or does not superimpose in
linear, non-interfering additive way. You are not testing
Fourier decomposition (which is math), but the superposition of
your signals (which is a physical property assumed in the
mathematics of Fourier decomposition). –  dmckee Feb 16 at 15:26
@dmckee Are you saying mathematical "facts" cannot be showed to
be true experime