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Thread: Negative Energy?

  1. #1 Negative Energy? 
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    What is meant by negative energy? How can it exist?


    Beyond Equations,

    Pritish
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  3. #2  
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    Read up on the Casimir effect for one example of negative energy.


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  4. #3  
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    Thanks for the reference
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  5. #4  
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    I am not sure that the Casimir effect is a good example of negative energy nor whether it is what you are actually looking for. Maybe you can give us an example of how you came across that term.

    In physics, potential energy depends on selecting an arbitrary reference point. A mass suspended above the ground has positive potential energy if we choose the ground as our reference point, but the potential energy would be negative if we chose a reference point above the mass.

    In chemistry, the energy associated with a reaction can be either positive or negative depending on whether the final reaction products are warmer or cooler than the initial reactants.

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  6. #5  
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    "Negative" energy is found in magnets, in that there is a depletion zone that tries to constantly fulfill itself by pulling its field around itself. Also, you can see it in mitochondria, in the way that it uses depletion zones, or negative energy to pull its electron chain along. You could also see it as positive potential energy though.....What do you think, are depletion zones negative energy or positive potential energy? Both?
    Of all the wonders in the universe, none is likely more fascinating and complicated than human nature.

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  7. #6  
    Forum Sophomore numb3rs's Avatar
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    zomg!!! all i can find on negitive energy is retarted freaken hippy stuff
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  8. #7  
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    Of all the wonders in the universe, none is likely more fascinating and complicated than human nature.

    "Two things are infinite: the universe and human stupidity; and I'm not sure about the universe."

    "Great spirits have always found violent opposition from mediocrities. The latter cannot understand it when a man does not thoughtlessly submit to hereditary prejudices but honestly and courageously uses his intelligence"

    -Einstein

    http://boinc.berkeley.edu/download.php

    Use your computing strength for science!
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  9. #8 gravitational potential energy. 
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    it is true that potential energy can be measured from an arbitrary point and can therefore become negative but that isnt the real meaning of 'negative energy'. energy itself is always positive. it cannot be created or destroyed. it can only be moved from one place to another.

    the energy stored in an electric/magnetic field (like charges repel) for instance is always positive. and for a system of charged particles and electric and magnetic fields the total energy of the system remains the same at all times. energy simply changing form as it is passed between the fields and the particles.

    strangely that is not true for gravitational fields due to the fact that, for gravity, like charges attract rather than repel. or rather it is true but only so long as you treat the energy stored in the gravitational field as negative energy. this negatitivity is absolute and has nothing to do with measurement from an arbitrary potential.

    some people will argue against this but dont listen to them. they dont know what they are talking about.
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  10. #9 Re: gravitational potential energy. 
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    Quote Originally Posted by granpa

    some people will argue against this but dont listen to them. they dont know what they are talking about.
    Yes, it is very important for the scientific community to keep a closed mind about what everyone else says. =p (sarcasm: for all those out their who may be impared in detecting when someone is being sarcastic)

    Anyway. Negative energy would mean there was negative matter. Even antimatter is not negative so, for now, there is no such thing as negative energy. Unless you believe in "Karma" =p

    This is why gravity is not a particle with a charge, the effect called "gravity" is simply what you get when space-time is curved by a massive object.
    "It's no wonder that truth is stranger than fiction. Fiction has to make sense." - Mark Twain
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  11. #10 Re: gravitational potential energy. 
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    Quote Originally Posted by SuperNatendo
    Quote Originally Posted by granpa

    some people will argue against this but dont listen to them. they dont know what they are talking about.
    Yes, it is very important for the scientific community to keep a closed mind about what everyone else says. =p (sarcasm: for all those out their who may be impared in detecting when someone is being sarcastic)

    Anyway. Negative energy would mean there was negative matter. Even antimatter is not negative so, for now, there is no such thing as negative energy. Unless you believe in "Karma" =p
    well if you are saying that negative energy is a stupid idea then i agree with you entirely. but the fact remains that it is the currently accepted explanation for gravitational potential.

    antimatter would be positive energy like everything else. it takes normal positive energy to make antimatter.


    consider a system of 2 massive objects far apart. imagine that they gravitationally attract and collide. energy is released yet their combined gravitational potential is greater than when they started.
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  12. #11  
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    Well, I actually read in some post (to a topic which I do not remember) about negative energy "flowing" into blackholes. I am aware that potential energy is dependent on reference frame and can assume a negative value, but Ive never heard of negative energy "flowing" into something.
    As per my understanding of energy conservation goes, "energy" flows, but only energy "change" can become negative.
    Please explain whether my understanding of energy is wrong, or that post (mentioned initially) is complete nonsense.
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  13. #12  
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    Quote Originally Posted by PritishKamat
    Well, I actually read in some post (to a topic which I do not remember) about negative energy "flowing" into blackholes. I am aware that potential energy is dependent on reference frame and can assume a negative value, but Ive never heard of negative energy "flowing" into something.
    As per my understanding of energy conservation goes, "energy" flows, but only energy "change" can become negative.
    Please explain whether my understanding of energy is wrong, or that post (mentioned initially) is complete nonsense.

    i have already answered that question. if you didnt hear me the first time then i am not sure what i can say now. i have merely been trying to explain the currently accepted idea of negative energy. i have not been trying to defend it. i dent believe it makes any sense.
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