Recent content by Peter McKenna

If two magnets, equally but oppositely charged, were placed one on top of the other, such that they repel each other, but the weight and shape would not allow the top magnet to slide off, what energy is generated by the relative weight (gravity acting on the mass) of the top plate overcoming the...

Marcus, About Causal Dynamic Triangulation, there still hasn't been much published out in layman's land. In the above discussion of LQG those terms almost describe an engineering model using an element system (something like a hydraulic model using links and nodes). Does this suggest that...

I have a question. Is Feynman's diagram for light reflection in glass a proof or example of bell's theorum exhibiting the local causality by the effect of photon spin/polarization and subsequent refraction (assuming spin is effected by; and local polarity is a function of the speed over...

I saw the term particle "entanglement" to describe photon interactions. In Everett's "Many Worlds" theory is "entanglement" the proper term? Or does this term only apply within the framework of the Copenhagen Interpetation, and the wave function view of particle interaction probabilities?

I'm not debating that, I seem to remember an electron positron pair production, or two electrons, one in reverse time, to satisfy symmetry, no?

The same experiment could be performed using electrons and a diffraction grating. The probability waves will tend to concentrate at the central "source" of the electrons. When the event (particle interference) is observed (at least the diffraction pattern), doesn't the probability wave...

Um, doesn't the two-slit experiment embody direct photon-photon interactions? Of course the Feynman diagram utilizes other virtual particles, but two photons can cancel each other. No? Note: This is in response to the guy who said two photons cannot directly interact.

I looked it up and I was thinking of Pair Production but it describes a similar condition, photon collision in a nucleas field, energy > hv, electron-positron annhilation, and a photon is released (gamma I believe). If I remember correctly, one of the particles is moving in opposite time...

Is Delbruck scattering where a photon collision results in an electron-positron annhilation which produces another photon?

"What would a single photon scatter?" An electron, minus the energy needed to release it. If insufficient energy is present, once the uncertainty plus photon has sufficient energy an electron would release. By my understanding, sooner or later a single photon can cause scatter. Its not a mtter...

Do you mean why? Heisenberg's uncertainty principle?

Can a photon be considered to be the composition of an electron or a positron combined with a hadron or a lepton? Does a photon include the possibility of both a matter and antimatter waveform?

Isn't that simply vector analysis? A Feynman diagram can be used for reflectivity in the same way and is a vector respresentation of the energy exchange. But can the exchange be isolated, that is, can two discrete photons be isolated and the resulting collison observed?

How could you identify a single photon photon collision?

How about creatng a virtual vacuum using two plates at distance < wavelength of visible light, using a full spectrum light source, a single slit filter just large enough for a single photon to pass through at a time, and using Casimir effect, measure the electrical potential difference between...