Recent content by gpran

Values of Scalar potential = q/r and Field E(r)=q / r2 can be obtained from Maxwell equations taking source as a delta function only. If electron is not a point particle at very small distances, then the formulas need modifications when used for very Small distances. But, even in Quantum...

The Poynting’s vector analysis in Classical Electrodynamics (Jackson J. D.) begins by stating that the charge and current density are continuous distributions. When the source is a point charge (delta function ); volume integral (E.J) is not possible. Field E(r)=1/ r is not Dirac-measurable...

Point Particle in Relativity and Electrodynamics: “The Classical Theory of Fields” – by Landau and Lifshitz, in its discussion about classical size of a particle, concludes that:- Thus we come to the conclusion that in classical (non-quantum) ‘relativistic mechanics’, we cannot ascribe finite...

Thanks for your reply. The space- time has properties which are very different from our normal understanding of ordinary space. This discussion was very useful in getting some idea about it.

I am really trying to understand: "You can always choose four directions and build a small set of axes (three rods and a clock). You can always do it twice, at slightly different places, and then ensure that they are oriented in the same directions in some sense. And you can always extend your...

Kindly guide me if there is any time difference between two points on this triangle? What is the time difference between two points on time space?

Thanks.

Basically trying to understand the physical concept of spacetime. Just trying to visualise the difference between two locations in ordinary space and spacetime geometry.

Thanks. Does the pseudo-reimann geometry represent the space-time space and the euclidean geometry represent the ordinary space? Then does it also mean that two points in spacetime are related by R/c?

General relativity suggests that path of light is curved around sun. This curvature is not dependent upon frequency of the photon. What is the physical difference between 'curvature of space' and 'curvature of space-time' ? We can make measurements at two points in space at same time. But there...

There can be a similar situation. A body of small mass- m1 is rotating around another mass- m2 with frequency f1. This two body system is rotating around a large mass M with frequency f2. What should be relation between f1 and f2 if we consider forces of gravity?

Two bodies of mass m each are attached by a spring. This two body system rotates around a large mass M under gravity. Will there be any relation between frequency of oscillation of the two body system and frequency of rotation? Frequency of small oscillations of a single body rotating in an...

I came to know about this concept of ‘Thermal Interpretation’ from the thread ‘Quantum Interpretation Poll (2011)’. I am writing this to get clarification about some of the basic concepts. 1) Please see the slide show: http://arnold-neumaier.at/ms/optslides.pdf. It mentions that the...

I came to know about this concept of ‘Thermal Interpretation’ from the thread ‘Quantum Interpretation Poll (2011)’. I am writing this to get clarification about some of the basic concepts. 1) Please see the slide show: http://arnold-neumaier.at/ms/optslides.pdf. It mentions that the...

Pl. see: http://physics.about.com/od/quantumphysics/f/manyworldsinterpretation.htm. As per many worlds interpretations ‘every time a random event takes place, the universe splits between the various options available. Each separate version of the universe contains a different outcome of that...