Modern and Theoretical Physics

hi i was wondering is it possible to produce helium from reactions in a particle accelerator

Can you accelerate a photon? (like any other elementary particle) ? Please advise.

The relation of colour charge to electric charge Dirac has shown how Einstein's expression for the relation of energy to momentum in Special Relativity can be factored into two linear parts using 4x4 Dirac matrices labelled J,K,L,M. [Dirac, P.A.M., The Principles of Quantum Mechanics, 4th edition (Oxford University Press) ISBN 0-19-852011-5] (E/c)2 - P2 - Q2 - R2 - (mc)2I = (E/c + rJP + gKQ + bLR + mcsM)(E/c - rJP - gKQ - bLR - mcsM) This is true for all 3! = 6 permutations of J,K,L where r,g,b and s equal +1 or -1. The set {I,J,K,L} forms the basis of a 4-dimensional real vector space. For leptons r,g,b all equal -1 and for quarks two of r,g,b are equal to +1 …

This is basically a question, but it deals with speculation, so I am not sure that this is the proper place to ask the question, but here goes. I was watching a math video that said that when considering the orbital path of an electron we should consider the orbital motion more like a wave than a nice clean elliptical. Other comments in SFN dealing with time and motion kind of made this question come to mind, which I will eventually get around to asking. I am assuming that the speed of light is a straight line measurement, with the assumption continuing that the photon is moving in a straight line path. We know that the path itself can curve and the photon can fol…

New to Physics, but it occurred to me that if for every action there is an equal and opposite reaction (At least in 3-D macro space) Could this same Law be true for propagation (?) along the 4th dimension of time? As an object ages or moves forward in time, could an equal and opposite reaction be that it also moves back in time? And if so, could these objects traveling negatively in time be the long sought after dark matter and an explanation of super symmetry? Could this explain some of the quirks of Quantum mechanics? Perhaps instead of a time line, it should be better categorized as a time circle. With one half of the circle being positive time and one half being n…

Is there a frequency of choice for conventional photovoltaic cells? How much of the incident energy is lost in conversion? (What is the typical efficiency of such a device?)

Evidence of This post is intended to alert readers to an exciting new 'discovery' the implications of which are open for consideration. This discovery is of the presence of pervasive shaping factors which 'show' their structure and organization through their influence on plastic and flowable matter. The units of evidence left by these shaping factors are referred to, here, as “leavings,” and these appear in the shape of “V” or “Λ.” As “Λ” appears the more two-dimensionally stable figure, leavings will be presented and illustrated as such. The relationships among leavings demonstrate fractal development, and a leaving-rich surface may show seemingly florid 'patterns' const…

Some of the images of particle collisions show what I believe to be paths that are curved in appearance. Is this because they are interacting with the medium created within the chamber as a result of the collision? Are they interacting with the forces of the accelerator because they have slowed down? Or is it the way the image projector interprets the data and presents it? Meaning do the curves distinguish something other than the particles path in the image?

Can I publish my final model ?

cerenkov radiation is characteristically blue. is it possible to red-shift the emitted frequencies through some method and change the characteristic blue color?

Hi, I have a problem which I can't resolve. I would like some hints which could help me to resolve it. A Hall-effect probe operates with a 120-mA current. When the probe is placed in a uniform magnetic field of magnitude 0.080 T, it produces a Hall voltage of 0.700 microV. a) When it is measuring an unknown magnetic field, the Hall volage is 0.330 microV. What is the magnitude of the unknown field? b) The thickness of the probe in the direction of B is 2.00 mm. Find the density of the charge carriers, each of which has charge of magnitude e (electron). Thanks

If they break the contaminated water into Hydrogen and Oxygen (for example, by electrolysis)... would those gases be contaminated?

Lightning is an ionized plasma like fire. Is there then a synergy between the two? Can "fire" then be created in space (as an ionized plasma, not as we know it on earth?) Please advise. Thanks in advance.

I want opinions about anything to do with interstellar travel.

I have question; What exactly does E=MC^2 mean? I thought I had a basic understanding, but the more I learn, well questions just seem to appear out of nowhere. It seems to be nothing more than the formula for momentum, where energy takes the place for momentum. Then there is the understanding that nothing with mass can move at C which would make E an imaginary value. The squaring of C implies that there should be a reason for squaring. So it seems we should have (M+M)C^2 with the result still being an imaginary value. And one more question; if anything with a mass of zero has to move at C, it would seem to make sense that anything with a mass greater t…

Neutrinos are known to pass through us at all time. Did they originate at the big bang? And are they still being generated? Do they co-relate with CMBR? Please advise. Thanks in advance.

Do tachyons violate EPR? Are they responsible for super-luminal communication (and possibly entangled states with greater than space like separation)? What are the current perspectives on the subject? Please express your opinion. Thanks in advance.

We know that the satellites are rotating around the earth, but when there are multiple satellites, we almost do not considerthe interaction between the satellite. When the atoms within the two electrons,Can they both rotate around the nucleus? We know The rotation of electron around the nucleus is planar motion. the conditions of plane motion is the force direction and the movement direction in the same plane. Within the atom, electrons and protons, the force of the same value, and thus between the electrons can not be ignored, because the protons and another electronic accumulative force of this electronic is not in the plane of rotation of the electrons around th…

We all know that E=mc2. Hence c = (+/-) sq.root (E/m) What is the significance of the negative root of this equation? And how does it reconcile with our understanding of c?

Can matter in plasma state (like fire for example) obey the law of fluid mechanics or are there other laws that govern the movement of plasma that differ from these?

Hi everyone, I have a question about molecular dynamics force field. Do the force field parameters depend on the equilibrium temperature? For example in the case of polymers, a material that is highly dependent on the temperature used? Thanks

Does nature really abhor a vacuum as the popular saying goes? I mean is there really something called a "true vacuum?" Now with the concept of dark matter and our knowledge of Cosmic Background radiation (which translates into mass if we read einsteins equation backward) there is nothing where matter (or energy) is truly absent? How do we explain this?

If you made the universe half of, say, beef, and half of gold, per weight, wouldn't it result in the same ol' universe coming to? Like wouldn't stars form and explode and create heavier elements and the whole shabang?

Is there an upper limit to the density of a quark-gluon plasma? If so, what is it? I believe this is the densest possible form of matter. If it isn't, what is?

First of all, I'd like to apologize for my lack of knowledge and sophistication, but I have some questions relating to the Higgs particle and its significance in particle physics, which I lack the understanding and resources to answer. I know some of these questions may seem a little basic, but human progress begins with challenging common ideas (I don't expect to change the world - just educate myself). The concept of the basic structure of atomic particle (protons, neutrons, electrons) has been commonly accepted for generations, and significant discoveries and advancements have been made as a result of research that has been driven from this perspective. This rese…