# Tag Info

4

There will be as many formulae as models, because it depends what one supposes dark matter is composed of. If WIMP In particle physics and astrophysics, Weakly Interacting Massive Particles, or WIMPs, are among the last hypothetical particle physics candidates for dark matter. The term “WIMP” is given to a dark matter particle that was produced by ...

2

He is referring to the second paragraph of 31-3: However, we shall discuss the formula we have obtained, in various possible circumstances. First of all, for most ordinary gases (for instance, for air, most colorless gases, hydrogen, helium, and so on) the natural frequencies of the electron oscillators correspond to ultraviolet light. These ...

1

Mathematically, the R-matrix is an (invertible) element of a quasi-triangular Hopf algebra. The R-matrix there is what "controls" the failure of the cocommutativity of your Hopf-algebra, and the Yang-Baxter equation is a consequence of all that. You can interprete it as a "braid-like" equation. See the wiki-pages on these subjects for more precisions. In ...

1

Since the comparison is to air molecules I assume this is a question regarding very small conductors. The premise of the question is incorrect. This can be seen qualitatively by observing that the reason Rayleigh scattering by a dielectric particles occurs is that they reduce the electric field impressed on the particle. For a perfect conductor, the electric ...

Only top voted, non community-wiki answers of a minimum length are eligible