The main problem with anti-gravity, is it would likely be to damn weak to help us out! Remember, there are four fundamental forces: Electromagnetism, gravity, weak and strong... The problem with gravity, is that it is EXTREMLY weak, and it's hypothetical quantum particle, the infamous graviton, is so far doing a good job at evading detection!

Now, to stay on topic, wouldn't the anti-particle of a graviton (the "anti-graviton") carry the same basic characteristics in terms of how strong it is? For a anti-gravity device to be of any use to us, it would have to be MASSIVE! The size of a planet to repel even the slightest bit!

That is the main probelm with anti-gravity, but lets poke at the smaller ones! Practical uses for anti-gravity! Let's see, cars... Not much else we could use it on, and it'd be awful difficult to control a car the is being tossed around by anti-gravity waves (if such a thing exists)!

Cost: I'm sure it'd be a fortune to afford something with anti-gravity attributes!

While it sounds like a beautiful idea for a sci-fi novel, I don't think there are many other uses for it...

Janus

Have you ever stared into nothingness, and seen a reflection?

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Originally posted by atomosXIII:
Nobody replies. I'm hurt... LOL! J/K!

Great Spirits have long found violent opposition from mediocre minds. The latter cannot understand it when a man does not thoughtlessly submit to hereditary prejudices, but instead honestly and couragesly uses his intelligence! -Albert Einstein

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Thank you for your patient.
In the physics this question is not important

Have you ever stared into nothingness, and seen a reflection?

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Originally posted by atomosXIII:
How does a discussion of gravity/anti-gravity pertain to philosophy?

Have you ever stared into nothingness, and seen a reflection?

-Me

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If you are ascing "what the things are". you are ina a field of philosophy, but if you are ascing "how the things are functioning", you are in a field of positive science: physics, chemistry.... The same thing is if you are ascing immediate cause of things or phenomena. If you are ascing for the first cause
-proteron aition - Aristotle, you are in a field of philosophy.
What is a gravity?
Schopenhauer answered : "it is a will of simple matter" .Wonderfull answer, but Newtons answer to the question: how the gravity is functioning is much more useful to a mankind than whole phylosophy on gravity and antigravity.
I am a prof. of philosophy, but when I deal with in a field of physics, I do not asc "what is a antigravity". I am ascing "how to achieve it and how it is functioning?" Although it is my the first and greatest love, philosophy is not useful in this field.
Thank you very much for your disscusion.
Petrus

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Originally posted by agravity:

If you are ascing "what the things are". you are ina a field of philosophy, but if you are ascing "how the things are functioning", you are in a field of positive science: physics, chemistry....

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Aren't things what they function?

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Originally posted by alexander:

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Originally posted by agravity:

If you are ascing "what the things are". you are ina a field of philosophy, but if you are ascing "how the things are functioning", you are in a field of positive science: physics, chemistry....

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Aren't things what they function?

Life is chemistry,chemistry is quantum mechanics,quantum mechanics is math.To learn about the origin of natural laws,natural forces and objects from math,click: http://www.emmynoether.com/

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O sancta simplicitas!
I just wanted to draw attention that it is a wrong way.
If we discuss antgravity, we are not interesting in "origin of natural laws"
I discovered gravifugal force just because I did not asced "what is gravity or antigravity or origin of natural laws.
But I understand you. It is very difficult to know those good questions. Many discoveries are in great meassure fruits of fortune and lucky circumstances.
If you try to discower something I wish you good luck.

W.K.

Why a particle having spin 2 only creates attractive force?

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Originally posted by agravity:

If you are ascing "what the things are". you are ina a field of philosophy, but if you are ascing "how the things are functioning", you are in a field of positive science: physics, chemistry.... The same thing is if you are ascing immediate cause of things or phenomena. If you are ascing for the first cause
-proteron aition - Aristotle, you are in a field of philosophy.
What is a gravity?
Schopenhauer answered : "it is a will of simple matter" .Wonderfull answer, but Newtons answer to the question: how the gravity is functioning is much more useful to a mankind than whole phylosophy on gravity and antigravity.
I am a prof. of philosophy, but when I deal with in a field of physics, I do not asc "what is a antigravity". I am ascing "how to achieve it and how it is functioning?" Although it is my the first and greatest love, philosophy is not useful in this field.
Thank you very much for your disscusion.
Petrus

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My point is that there is now difference betweeen what things are and how things work - it is one and the same thing. Say, the question "what is an atom?" is completely equivalent to "what structure results from interaction of electron with proton?", or to "how electron and proton interact?". Note that you can NOT say that atom is a proton and an electron, because neither of them have atom inside - an atom is a structure which mathematically arize from their INTERACTION, and if no interaction takes place, no atom arizes from electron and proton.

Same with any other physical object - it is just a mathematical structure arizing from the way its "parts" interact with each other.

So, theoretical physics (=math) is to blame for what things are and for how things and phenomena appear to us - as an apple, or as a smell, or as a color, or as an electron, or as a heat, or as a mass, as a gravity, etc...

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Originally posted by W.K. TSE:
What we have the most efficient anti-gravity machine now is the floor you're standing on.

W.K.

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Alexsander, Alexander - Hominum Defensor - lat.
"My point is that there is now difference betweeen what things are and how things work - it is one and the same thing."
You probably know how the gravity is functioning. Newton described it by several equations. However, in spite of that you ask: "what is a gravity?"
!!!???
Veritatis Defensor

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Originally posted by LURCH_001:
According to an artical on negative energy I read in Scientific American, negative energy is yes?

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Originally posted by douggied2001:
What proof is there of negative energy?
I know there is energy but what is "negative energy" our is it just a theory with no results as of yet?

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Although it could be said that negative energy is still a theory, this is only in the sense that black holes are; we have no way of detecting them directly, yet. However, this may change in the near future.

But the phenomenon is predicted by the uncertainty principle, and scientists have produced conditions in the lab that agree with the predicted properties of negative energy to within a factor of 1%.

Perhaps negative energy can best be understood by reminding ourselves that our gradiant for measuring energy is callibrated by the state of the vacuum. Though we tend to think of the vacuum as an area of 0 energy, we know that it fluctuates on the quantum level. Therefore, if it is possible to cause these fluctuations to cancel one another out, we can create an area in which the energy value is less than 0. Put another way, the vacuum fluctuation is a result of the uncertainty principle, and the total effect is "0", so the fluctuation must very from slightly above 0 to slightly below.

Examples would include Hawking radiation (which is also just a theory), and the Casimir effect (which has been observed). Compressed states of lasers also produeced negative energy. It is generally accepted by the scientific comunity to be a proven phenomenon.

agravity,
Have not yet read your antigravtiy site, does it refer to the Casimir effect?

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Originally posted by LURCH_001:
Sounds like a good read, I'll try and get to it in the next couple of days.

Although it could be said that negative energy is still a theory, this is only in the sense that black holes are; we have no way of detecting them directly, yet. However, this may change in the near future.

But the phenomenon is predicted by the uncertainty principle, and scientists have produced conditions in the lab that agree with the predicted properties of negative energy to within a factor of 1%.

Perhaps negative energy can best be understood by reminding ourselves that our gradiant for measuring energy is callibrated by the state of the vacuum. Though we tend to think of the vacuum as an area of 0 energy, we know that it fluctuates on the quantum level. Therefore, if it is possible to cause these fluctuations to cancel one another out, we can create an area in which the energy value is less than 0. Put another way, the vacuum fluctuation is a result of the uncertainty principle, and the total effect is "0", so the fluctuation must very from slightly above 0 to slightly below.

Examples would include Hawking radiation (which is also just a theory), and the Casimir effect (which has been observed). Compressed states of lasers also produeced negative energy. It is generally accepted by the scientific comunity to be a proven phenomenon.

agravity,
Have not yet read your antigravtiy site, does it refer to the Casimir effect?

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Fortunately not. The gravifugal force is much larger than atracting force that causes Casimir Effect.
We are subjected to that force every day and we meassured it many times in highest degree of acuracy.
I am living at geo.lat. 46 degree, and because of actioning of gravifugal force, my weight is 0,017 % lesser than my weight at pole. (Still 0,009 because of flatness of Earth.) Total 0,026 .
We use gravifugal force in astronautical pracitce, but we do not understand it quite correctly and that is why we can not understand that it can be much more usefull.
But the main problem is in fact that this force is really very large and too near us - just under one`s nose.
Petrus
P.S. Aerospace engineers, Golsh brothers made the second gravifugal device several days ago. I will writte about it at my site as soon as possible.