On 11/18/2022 2:19 PM, John Clark wrote:
On Fri, Nov 18, 2022 at 4:51 PM Brent Meeker <[email protected]>
wrote:
/> That's an energy density lower than the surrounding vacuum. The
conducting plates exclude longer wavelengths relative to their
spacing. This is not the same as negative energy in the vacuum./
If you assume the surrounding vacuum has a zero energy density, which
is an entirely reasonable assumption to make because that is a pretty
good definition of a vacuum,
But it's not. We even have an empirical estimate of the value now from
cosmology, Lambda=1.1e-52 per m2.
https://physics.stackexchange.com/questions/577527/prove-that-the-value-of-the-cosmological-constant-equals-the-energy-density-of-t
Brent
and if the volume between the plates has a lower energy density than
that, then I don't see how something can be less than zero without
being negative.
John K Clark See what's on my new list at Extropolis
<https://groups.google.com/g/extropolis>
7fc
pl6
On 11/18/2022 3:38 AM, John Clark wrote:
On Tue, Nov 15, 2022 at 3:00 PM Brent Meeker
<[email protected]> wrote:
/> A stable wormhole requires threading by negative energy
density. Since no such negative energy field is know and
it's existence would imperil the stability of matter, its
existence seems highly unlikely./
In the Casimir Effect (which has been experimentally confirmed)
the narrow space between 2 flat conducting plates has a negative
energy density, and that causes an attraction between the 2
plates because there is more energy outside the plates pushing
the plates together than there is between the plates pushing the
plates apart.
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