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anantchowdhary
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What exactly makes forms of energy different from each other?
Can we say that mass is a dense concentration of energy?
Can we say that mass is a dense concentration of energy?
anantchowdhary said:What exactly makes forms of energy different from each other?
Again, the definition of energy is the capacity to do work. Different forms of energy go with different forms of work. Ie, mechanical, electrical, thermal, etc:anantchowdhary said:So now i hav another doubt,Why are forms of energy different?
anantchowdhary said:What exactly makes forms of energy different from each other?
Can we say that mass is a dense concentration of energy?
anantchowdhary said:Hi ZapperZ,
see first of all u cannot clump energy in motion(photons CANNNNOT exist at rest).And hence the energy together won't hav spin.So this situation is INVALID SIR!
anantchowdhary said:and ZapperZ,When mass is "converted" to energy on nuclear reactions(say light energy therefore photons),how does spin change suddenly?
anantchowdhary said:Also ZZapperZ,light shud create gravity if focussed to such an extent that it may hav a very strong gravitational field.This is as energy has the same effects of mass!
anantchowdhary said:Here in the nuclear reaction case,mass is CONVERTED to energy.Im sry as i wrote energy>>mass
anantchowdhary said:Hey Zapper ok so HOW exactly does mass get converted into energy.From scratch pls explain
ZapperZ said:It doesn't matter. There is STILL a bunch of particles involved. In the matter-antimatter anhilation, you STILL need two particles to maintain the conservation. You just don't have a particle spontaneously disappear into energy with nothing else involved.
Zz.
ZapperZ said:For those of you who think that mass can be defined as nothing more than "concentrated energy", consider the following:
Take an example of "pure" energy such as photons. Now clump them all very tightly to form as mass per the scenerio of the OP. Now explain to me the following:
1. photons have no charge, yet, electron, quarks, etc... all do. Where do these charges come from?
2. Photons have spin of 1. elementary fermions have spins of 1/2. How do you get the basic projection of the "units" of 1 to get spin of 1/2?
3. Photons do not interact via the weak interaction (they don't, at this point, participate in strong interactions either, but in some postulated theory, they might in higher order interactions). Yet, we know many particles that do. Where did that come from?
Zz.
anantchowdhary said:What exactly makes forms of energy different from each other?
Can we say that mass is a dense concentration of energy?
anantchowdhary said:Also ZZapperZ,light shud create gravity if focussed to such an extent that it may hav a very strong gravitational field.This is as energy has the same effects of mass!
wat is energy said:i agree ENERGY HAS SAME EFFECTS OF MASS.
one example is photoelectric effect.
photon which is "PURE" energy wen strikes an electron its displaces it. the effect is same as wen an electron is hit by a mass.
so anantchowdhary is rite.
wat is energy said:photons hav no charge i agree yet mass formed from it has charged particles.so wats the big deal. same happens wen neutron (uncharged) gives beta emission and protns both of which r charged. wat i guess(its only a guess) the overall charge is conserved.
wat is energy said:"PURE" energy like photon
ZapperZ said:The photon is NOT converted into an electron in there,
I think i hav been misinterpretated. What i meant was that you said that photon is pure energy packet. On hittting the already present electrons it imparts energy to them, basically displaces them. this is same as when an electron if struck by another particle say neutron. so photon / energy has same effect as mass.
anantchowdhary said:Is photon purely energy?It shud having some moving mass.The mass can be attributed as a concentrated form of energy.But the mass--->0 as the density of energy of a photon is MINUTE[/QUOT
Photons are particles which have all of their mass converted to energy.
energy of a photon = h *v
energy = mass of photon * c^2
mass of photon can be found just that all its mass is in the form of energy
ZapperZ said:For those of you who think that mass can be defined as nothing more than "concentrated energy", consider the following:
Take an example of "pure" energy such as photons. Now clump them all very tightly to form as mass per the scenerio of the OP. Now explain to me the following:
1. photons have no charge, yet, electron, quarks, etc... all do. Where do these charges come from?
What i mean to say is that a neutron is uncharged. But it still gives rise to charged paricles. So from where do these charges come from ?
Can't a similar case happen when supposing photons are concentrated. It may be that overall charge is conserved in this case too.
Good question. One can however only speculate about this (something which is not really appreciated in this forum, so I'll be carefull ).anantchowdhary said:What exactly makes forms of energy different from each other?
Can we say that mass is a dense concentration of energy?
notknowing said:Good question. One can however only speculate about this (something which is not really appreciated in this forum, so I'll be carefull ).
Personally, I think that your idea as a concentration of energy is basically correct. Energy is normally associated with "work" which implies the product of force times distance. So, energy is normally related to things which "move". Light is a clear example of this. If you look at a proton from a distance, you don't see movement but if you go down to the quark level, things ARE in motion and at a deeper level, one could suspect that also quarks are composed of other particles - in motion. And of course, one has also all the virtual particles moving in between. So, continueing this line of argument leads to the conclusion that (probably) mass (or particle) is that thing in which energy (motional) is confined to a limited region of space. Instead of talking of conversion of mass into energy, it would be more appropriate to talk about the release of energy (from the confined region into the larger region).