More precisely, they are most close to the real model of gravity, but of course they are not right theories (just a sets of rules, which whether well or bad work). However, today we have nothing better than they are.
In fact if you even somebody else try to measure a mass, then you even somebody else can obtain only a (rest) mass. In this sense a mass doesn't increase with velocity, nobody can to measure it because a (rest) mass is an invariant.
I like it. After Pauli's book everyone should termed the mass... kinda "Oh! yes, of course, I quite forgot (in Pauli's terms, not Einstein) the rest mass..."
Just say me, you really use those terms when you read or use the QFT??? There are no the relativistic or rest mass and total and rest...
Energy yes, mass no.
What is a relativistic and rest mass or total and rest energy? What for? Moreover with c=1. Energy and mass.
In general, I think, that we already have understood each other.
Of course, not. You’ve made mistake again p=mug, where
`````____
g=1/Ö1–b2,
b=u/c.
In Einstein's first paper he really does speak of transverse and longitudinal mass, but he obtain the following equation,
``````````______
W=mV2(1/Ö1–u2/V2–1)
where m – mass, V – speed of light.
And...
Once again, mass is an invariant concerning Lorentz and Poincare transformation groups. You can't defining mass by gravitation, because measure of attraction within dependence to both an energy and direction of moving. E.g. two photons with the same energy, but the perpendicular momentums will...
English is much easier than German, French and Chinese, last ones are much easier than Russian. But English is most useful for managing and mutual understanding, Russian is most useful for expression of emotions.
That's mass, you can call it the rest energy, but not rest mass.
You've made mistake. In general, E0=mc2, but total energy of particle E is equal to mc2 if and only if the particle's momentum p is equal to zero, because E=p2c2+E02=p2c2+m2c4
Let c=1, then
E=p2+E02=p2+m2.
The serious...
Because photon has both linear part of four-momentum, and helicity, therefore it needs the four-dimensional space. You can't describe a photon in space having smaller dimensionality. You can't conserve both momentum, and helicity, and spin, without four-dimensional space.
Congratulations! mmm.... I try to recall - when I've got my first job... it was a long time ago... I was only eleven years old... the assistant of the geodesist.
Bingo! If we agree with the concept of secondary quantization within the framework of QFT, then of course yes - the (local) time is only difference between two nearest states of the same physical system.
Actually you take one quantization of continuous time for descrete nature of time. Within the framework of QFT the time is discrete. The secondary quantization concept allow to sustitude the time with indexes, because the main difference A1-state from A2-state is the index. We need the time only...
Well... one and the last time. The set theory operates sets by using operations such as x - direct product of sets, Å - direct addition of sets, U - join of sets, Ï - intersection of sets. The main requirement is that the results of all the above operations with sets are sets as well. Only this...
Once more, which of my definitions (formulas) exactly redundant and complicated? The emty set is only a formula, not an axiom (prove me that my definition of FORMULA of empty set is an axiom; the formulas !x=Æ and z=Æ (in Z7 and Z8) can be substituted with full definition of the empty set... am...
Hi eljose79
Because "this way" explains nothing. Just try to calculate the anomalous magnetic moment of electron by "this way"... of course you can't...
Of course! Bingo! And I think so, too! Maybe I was not clear enough. My point is that ZF exclude an axiom of the empty set because the empty set concept is a theorem within the framework of ZF, not an axiom. But I asked Organic to give the empty set definition of his own, because the ZF empty...
Not exactly that way. The system of axioms (of a specific physical theory) may content time as axiom, and may not... time can be only a theorem (e.g. there are axioms of three-dimensional linear space and four-dimensional invariant, such as four-dimensional interval in the Minkowski space-time)...
Within the framework of quantum field theory secondary quantization implies that motion doesn't exist, i.e. time is defined as transition of a physical system with one set of observable values (say, A1-state) to another set of observable values (say, A2-state). If A1-state differs from A2-state...
Why do you need another axiom? Don't you think that we could do with existing ones?
In the case of the idea of the set, x is only an uncertain set, nothing else.
Hello there.
What do exactly we consider? Whether time does exist or it doesn’t? What is time? Whether is time a dimension of space, enclosing us, or is it part of metrics?
Generally, time is not illusion, but motion is. Maybe, the problem is to define time. However, this problem can also be...