Here's something I posted before about wornholes: the papers mentioned are worth looking into.Note the Visser paper mentions that wormholes are possible with arbitrarily small energy condition violations. The Casimir Effect is an energy condition violation, bigger than arbitrarily small.Wormholes and the Casimir EffectBoth Visser et. al. (2003) and Morris et. al. (1988) have done calculations about wormholes. Apparently they are possible only using the Casimir Effect, which is a small energy condition violation.The amount of negative energy generated by the Casimir Effect depends on the distance between the metal plates and a value for the vacuum energy density. Vacuum energy density values range from 0 to 10^92 kg/m^3 (Weinberg, 1989). More recent estimates place the value between 10^19 kg/m^3 to 10^53 kg/m^3 (NASA). I will be assuming that the vacuum energy density is 10^19 kg/m^3. This is a conservative yet reasonable estimate.If one has 2 perfectly flat metal plates each say 1 m x 1 m x 10nm, and these are placed so they are some small distance apart, say 1nm from surface to surface, these plates will produce the Casimir Effect....However, even if the Casimir Effect only excludes 1% of the energy in a vacuum from between the plates, that 1% would still amount to 10^17 kg/m^3.
Quote from: scienceguy on 07/12/2008 10:05 pmHere's something I posted before about wornholes: the papers mentioned are worth looking into.Note the Visser paper mentions that wormholes are possible with arbitrarily small energy condition violations. The Casimir Effect is an energy condition violation, bigger than arbitrarily small.Wormholes and the Casimir EffectBoth Visser et. al. (2003) and Morris et. al. (1988) have done calculations about wormholes. Apparently they are possible only using the Casimir Effect, which is a small energy condition violation.The amount of negative energy generated by the Casimir Effect depends on the distance between the metal plates and a value for the vacuum energy density. Vacuum energy density values range from 0 to 10^92 kg/m^3 (Weinberg, 1989). More recent estimates place the value between 10^19 kg/m^3 to 10^53 kg/m^3 (NASA). I will be assuming that the vacuum energy density is 10^19 kg/m^3. This is a conservative yet reasonable estimate.If one has 2 perfectly flat metal plates each say 1 m x 1 m x 10nm, and these are placed so they are some small distance apart, say 1nm from surface to surface, these plates will produce the Casimir Effect....However, even if the Casimir Effect only excludes 1% of the energy in a vacuum from between the plates, that 1% would still amount to 10^17 kg/m^3.10^17 kg/m^3 is almost unimaginably large amount of energy.I replied to your earlier post that many people moved metal plates to these distances, do I have to believe they all somehow missed several quadrazillion megatons of TNT released in the process?
Quote from: gospacex on 07/12/2008 11:27 pmI replied to your earlier post that many people moved metal plates to these distances, do I have to believe they all somehow missed several quadrazillion megatons of TNT released in the process?Indeed. It depends on what the vacuum energy density is. However, as far as I know, no one has made metal plates exhibiting the Casimir Effect in a circle...
I replied to your earlier post that many people moved metal plates to these distances, do I have to believe they all somehow missed several quadrazillion megatons of TNT released in the process?
Karl:No evidence of FTL, if you would bother to look, there is plenty of credible experimental data that says differently. Oh well, I guess there's not much point in discussing this topic with you since you have already made up your mind and tossed it in the trash can. Have fun with your rockets and electric motors...
My take is that any FTL effect is going to be rather hard to find else we would have seen it already. The low lying fruit has been picked.
Quote from: khallow on 07/13/2008 10:54 pmMy take is that any FTL effect is going to be rather hard to find else we would have seen it already. The low lying fruit has been picked.Low lying fruit such as travelling faster than light with our current technology and theory? Chemical rockets, which have been around for a thousand years? All of our high-energy efforts have been around accelerating ions and smashing them into things. Quantum physics has evolved because we have been doing that in labs. Maxwell's therorems have been expanded upon because they've been experimented with (such as varying particle acceleration). Relativity, on the other hand, hasn't changed since a certain postal worker wondered about it. It's only been confirmed... but now there are lots unanswered questions starting to pop up - like inflation and slingshot effect. And inertia is still just "becuase it's there."
http://en.wikipedia.org/wiki/Double-slit_experimentIn particular the single photon or electron experiments show nonlocality in BOTH space and time.
In addition to the theoretical consequences of the theory, there has been repeated testing of general relativity over many years. It's surprisingly successful.Finally, I don't see any reason inertia will be explained better than it currently is. "Because it's there" is an undescriptive truism for phenomena, but that's fundamentally what reality gives you.
Quote from: khallow on 07/14/2008 06:43 amIn addition to the theoretical consequences of the theory, there has been repeated testing of general relativity over many years. It's surprisingly successful.Finally, I don't see any reason inertia will be explained better than it currently is. "Because it's there" is an undescriptive truism for phenomena, but that's fundamentally what reality gives you.I doubt inertia is "just there." I "feel" it has to be governed by rules, whatever they are. It was thought that the speed of light was "just there" and yet recently it's being found that it has varied. Space itself is expanding, as well (according to the relativistic view of expansion).Now, have you any explanation for the MLT's exerted thrust in a vacuum?
What was allegedly found to vary was the fine structure constant which is dependent on several things including the speed of light, charge of an electron, and Planck's constant and all which are traditionally considered constant throughout space. I don't know what is the current state of this work. The expansion of space, if it is occuring, is consistent with a general relativity explanation via the "cosmological constant".Second, it's very easy to break a vacuum especially if you have high voltages in your system. Any charge leakage or arcing would release some charged particles that you could use as propellant. That would be my first guess for an MLT having thrust in vacuum.
QuoteJim - 11/5/2008 4:00 PM$$$$$How much?
Jim - 11/5/2008 4:00 PM$$$$$
Quote from: Disssident on 05/17/2008 05:42 pmQuoteJim - 11/5/2008 4:00 PM$$$$$How much?My understanding is that the Lightcraft system would require the entire energy output of the USA to put a Mercury spacecraft mass into orbit. That would cost some $$$$.
The primary focus of these endeavors should be the creation of a star drive. If not superluminal at least 80% the speed of light, which when taking consideration of the human lifespan, would allow exploration of nearby star systems.
Interesting physics, such as, zero point energy, negative energy, action at a distance, quantum entanglement and quantum teleportation exist and is a fact.
A Manhattan type of endeavor is required to create and develop the technologies at a mature level in order to produce the star drive.
a) negative energy has been created in the lab (Fact);
b) Teleportation at the atomic level has been achieved (Bell Labs)
c)Laser Wakefield beams have been created (accelerators the size of table tops) Naval Research Lab TeraWatt level..Virtual particles created based on Quantum Electrodynamics confirmed.d)Quantum entanglement at a huge distance (Experiment verified and confirmed Los Alamos)e)Antimatter confinement possible though hugely expensive at the moment. Antihydrogen has been made..g)matter beam amplification thru bose einstein condensate experimentally confirmed..
f) Zero point energy confirmed; huge technological barrier due to thermodynamic leakage.h) theta pinch plasma drive under development (NASA)...
Some computer models show that metric can be manipulated. However, tremendous energy is required.
Profitability:a) Every dollar spent would have a return similar to the Apollo program.b)The materials, engineering services, support infrastructure, etc would drive the economy.