Hi, I'm in the process of learning conformal field theory from Di Francesco, Mathieu, Senechal, and need some help with something I perceive as a paradox: There are three...

I recently discovered an error I'd made in a simple analysis of a situation in special relativity, and I thought it was worth describing here, to help others to avoid...

My question is about whether spacetime has a spin structure. I don't know that much about how spinors are used in physics (well a little bit) but I had always assumed that a...

What would actually happen if a small stable or long-lived black hole fell into the ground? Or even a naked singularity or some other strong, compact gravitational...

There is a hypothesis, that whole Universe could be generated by some simple rule set up as a program. Some data about the very early Universe is already available from...

This was posted in sci.physics 12/10/06 under the thread name Newton's Rings. The one explanation was off the mark I think so I post again here. For my son's report on...

This is a follow up to the earlier thread "Questions about Higgs scalars." In the context of QFT, I am especially interested in learning as much as possible about the...

Does anyone know if it is possible to wirelessly transmit electricity from one point to another like light or radio waves? I know that you can generate electricity from...

Hello, I have a basic question about superconductive transition-edge sensors (TES) when used in the x-ray gamma ray range. I understand that a photon's interaction with the...

Apparently my answer to this question from Ted Bunn was off topic for the thread in which it appeared. Nonetheless questions regarding gravitons and whether we should believe...

What makes the Hulse-Taylor binary pulsar special--why shouldn't ANY matter emit gravitational waves? Is there any difference? " systems which emit gravitational waves are...

Would it be correct to say that space and time are two sides of the same coin, and matter and energy are two sides of another coin? Are space-time and matter/energy...

A question from a near beginner... The flow past a cylinder is commonly illustrated with a graph of drag coefficient and a set of diagrams such as this...

All books have tables with the electrical charge of all elementary particles, including electron, neutrino, quarks, Z, W, etc. Why are there no tables with the *weak charge*...

Why not so much ado if, as I am suggesting, the axis of evil is an indication of a flaw in our interpretation of a microwave background that is in fact local, not cosmic, in...

Hi everyone, I would like to know if someone has reviewed the experiments performed by Del Giudice and Preparata at INFN in...

As shown he http://math.ucr.edu/home/baez/dodecahedron/14.html the Greeks might have been fooled by fool's gold into inventing the golden ratio. What matters to me now...

As I search for such a meter for the MOEPED, I find things like: http://www.rc-electronics-usa.com/ammeter-simulator.html which may be of interest to educators here in this...

Once again, the ghost of a preferred frame of reference in our universe arises. All those maps of Cosmic Microwave Background Radiation (CMB) provided by WMAP show non...

Why can we add masses together and get a mass? This question may seem stupid, but we can't do the same with time: we need to add a time and a *duration* to get another...