Re: [Phys-L] Bravais versus Foucault pendulum
Those faced with a paywall at the givenURL may profit from viewing the paper
at Researchgate here:
(PDF) The Bravais pendulum: The distinct charm of an almost forgotten experiment
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(PDF) The Bravais pendulum: The distinct charm of an almost forgotten ex...
PDF | In the year 1851 in Paris, the apparent change of the plane of
oscillation of a linear pendulum was observ...
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...Where the walls may be vaulted at some sacrifice in filling in forms without
cost.
On Thursday, February 29, 2024 at 12:37:24 PM CST, John Denker via Phys-l
<phys-l@mail.phys-l.org> wrote:
Hi --
If anybody is considering building a Foucault pendulum, consider a Bravais
pendulum instead.
Think of what you know about polarization (as applied to photons and other
2-state systems).
A Foucault pendulum is X-polarization that gradually turns into Y-polarization.
A Bravais pendulum is RCP that proceeds at a different speed from LCP. That's
equivalent to saying the Coriolis effect adds or subtracts from the
gravitational restoring force.
A Foucault pendulum looks simple, but it is notoriously hard to build a *good*
Foucault pendulum.
The Bravais pendulum has a different and reportedly milder set of problems.
I am not an expert. I have not researched this. I raise it as a hypothesis for
you to consider.
Reference:
V M Babović and S Mekić
"The Bravais pendulum: the distinct charm of an almost forgotten experiment"
https://iopscience.iop.org/article/10.1088/0143-0807/32/4/020/pdf
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