Recent content by aashay

There is nothing specific or special that needs to be done.

What do you mean by a condition?Do you want to know at what speed it should move to be termed as relativistic?

Can anyone explain to me what exactly is a charged black hole?Where is the charge?Is it on the singularity or somewhere else?

I have already done the derivation of Einstein's equations from variational principle and have also done the Schwarzschild solutions. I will see the other solutions.

I am new to General relativity and want to master it. Can you suggest some problem or a project on which I can work in summer holidays or so that will enable me to enhance my knowledge of general relativity and its applications?I have the basic knowledge of GR and am pretty familiar with the...

But the moment you bring Christoffel symbols into the picture, don't you march away from Newtonian Physics to General Relativity by taking into account the effects of curvature? And all this has been done quite recently after GR was developed and not at the time of Newton.vCorrect me if I am...

I still don't understand how can you say that. Clearly Newton's laws are not valid in accelerated frames of reference and there is no concept of curved space-time either. Can you please clarify?

But that is done by Cartan and not by Newton! Its a re-formulation of the theory. And there is no concept of curved space in Newton's theory. So no need of General covariance.

General covariance does not hold for Newtonian Physics as well as special relativity. It is only applicable for general relativity. In fact the very nature of curved space-time requires the laws to be generally covariant.

I am new to general relativity and want to solve some nice problems in it. Can you suggest some book or website where I can get nice problem on GR?

What you are arguing here cannot be explained even by GR.Actually, there is a different theory called the Einstein-Cartan theory which explains this by extending GR to include spin angular momentum.

You are welcome..By the way, what is 'grtensor'?Is it some kind of software?

hey check your calculations...I tried calculating it manually and I got a non-zero Einstein tensor. I got it as a diagonal matrix.

I have always had the doubt that which type of cells evolved first,the prokaryotes or eukaryotes...although many people favour that prokaryotes came first..i would like to know your opinions..support your opinion with proper reason/logic.

Even I am interested in knowing it. Someone please provide information...