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quantumnumber
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What is antigravity? How would it possibly work?
quantumnumber said:What is antigravity?
Nope, this concept violates all fundamental (and other) principles of "physics".How would it possibly work?
How is that ?russ_watters said:Since "antigravity" isn't really a scientific terrm, it is tough to really say what it is. Depending on how you read the term, an airplane could be an anti-gravity machine.
scott1 said:According to General relativity in order to have something with "Anti gravity" it has to have negative mass and that breaks the laws of physics.
marlon said:Well, you know what gravity is, no ? Think of THAt and then imagine "the opposite"...Nope, this concept violates all fundamental (and other) principles of "physics".
Might I ask why you are wondering about this ? What triggered this line of questioning ?marlon
marlon said:You need to invest energy to "beat" gravity, which is ofcourse always the case. Anti gravity does NOT exhibit this "property".
marlon
http://www.nasa.gov/centers/glenn/research/warp/ideachev.html#negNegative mass propulsion
It has been shown that is theoretically possible to create a continuously propulsive effect by the juxtaposition of negative and positive mass and that such a scheme does not violate conservation of momentum or energy. A crucial assumption to the success of this concept is that negative mass has negative inertia. Their combined interactions result in a sustained acceleration of both masses in the same direction. This concept dates back to at least 1957 with an analysis of the properties of hypothetical negative mass by Bondi, and has been revisited in the context of propulsion by Winterberg and Forward in the 1980’s.
Regarding the physics of negative mass, it is not known whether negative mass exists or if it is even theoretically allowed, but methods have been suggested to search for evidence of negative mass in the context of searching for astronomical evidence of wormholes.
There are a large number of threads on topic of antigravity--many different views presented (and many differ models on how it would work)--here are links not locked:quantumnumber said:What is antigravity? How would it possibly work?
marlon said:Yes but i see no need to go all the way up to GR, the same fact is valid in classical physics as well.
marlon
Someone asked me about it!Might I ask why you are wondering about this ? What triggered this line of questioning
I am not sure, or what would that be?According to General relativity in order to have something with "Anti gravity" it has to have negative mass and that breaks the laws of physics.
you are not negating gravity, you are overcoming it. there's a difference.if i jump into the air, i am creating a force that temporarily negates gravity. by defenition am i creating anti-gravitational energy? possibly, but anti-matter as an energy wave does not exist and is impossible.
scott1 said:I thought in classical physics anti gravity was possible.
Ki Man said:if i jump into the air, i am creating a force that temporarily negates gravity. by defenition am i creating anti-gravitational energy? possibly, but anti-matter as an energy wave does not exist and is impossible.
Perhaps the gravitons and antigravitons mediate gravity and antigravity forces between mass asymmetrical matter and antimatter boson and fermion entities ? Union of bosons and fermions is a fundamental condition of super-symmetry--see here: links:http://www.maths.usyd.edu.au/u/hughl/SUSY.htmlKi Man said:yes, but the question is what would those antigravitons do? we arent even sure if gravitons exist yet let alone what governs their actions
hustleberry said:antigravity spawned from the notion of antimatter and from there people thought of anti matter galaxies,universes,space-time,and hence gravity its just like saying that since we a north pole and south pole that there is a whole world with south poles only. which just complete nonsense but however antimatter does exist and when combined theoretically produces an enormus burst of energy
Antigravity is a hypothetical phenomenon in which objects can be made to defy the force of gravity, allowing them to float or levitate.
The exact mechanism of how antigravity would work is still unknown and remains a topic of scientific research. Some theories suggest that it could be achieved through the manipulation of gravitational fields or through the use of exotic materials with negative mass.
While there is currently no scientific evidence to support the existence of antigravity, it is not completely ruled out. Some experiments have shown small effects that could potentially be linked to antigravity, but further research is needed to confirm its feasibility.
If antigravity were to be successfully developed, it could have a wide range of applications in transportation, space travel, and even medicine. It could also potentially revolutionize the way we understand and interact with the laws of physics.
Currently, there are no known examples of antigravity in real life. Some claims have been made about antigravity devices, but they have not been scientifically proven or widely accepted. The concept of antigravity remains purely theoretical at this point in time.