On Wed, Jun 27, 2018 at 3:38 PM, Brent Meeker <[email protected]> wrote:
​>>​ >> The Casimir effect has demonstrated that the vacuum between 2 conductive >> planes that are very very close to each other contains negative energy >> density. > > > * ​>​Not exactly. There is just less positive energy density than outside > the plates. I don't think that's equivalent to the negative energy density > needed to keep a wormhole open.* > If you talk about negative energy you've got to say negative with respect to what. If zero isn't the energy in empty space far from any matter what is zero? In gauge forces the important thing is not the absolute value its the difference, that's why a bird can safely perch on one high voltage power line but not on 2 if they are at different voltages. John K Clark -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
