Recent content by CassiopeiaA

I thought isotropy means uniformity in all directions. For example, if I know density variations in one direction, it should be same in all the other directions. What does this has to do with the distance?

Okay thanks.

Oh Okay. So there is no known correlation between photon polarization and spin of electron-positron pair in case of pair production?

I just started reading Stern Gerlach Experiment and this thought crossed my mind. Totally a hypothetical question. If I pass an electron and positron through separate SG apparatuses, I will know in which spin state each particle has collapsed. But afterwords I let electron-positron pair...

No problem. I will cite all of your usernames in my groundbreaking paradigm shifting paper : "Can you really get the whole world in your hand?"

Ah I see it now where I was mistaken. But still, the question about universe being finite or infinite remains in my head.

I always have trouble understanding this concept. Please correct me if I am wrong somewhere in my line of thought. Is the universe finite or infinite? Using the famous balloon analogy, we can think of it as a finite expanding universe. But in that analogy the balloon has a curvature. Does the...

I just started reading general theory of relativity. I have some elementary questions. Not an english speaker so bear with me. I am reading the thought experiment which describes path of a photon in a free falling lift. For an observer inside the lift, the photon path is a straight line. But...

I took 2X2, 3X3 and 4X4 matrices with unknown variables and did the operation on them. All of them satisfied the condition. I also did a small proof for NXN matrix, that the above condition is true for any matrix.

I am reading Chapter 9 of Classical Mech by Goldstein.The symplectic condition for a transformation to be canonical is given as MJM' = J, where M' is transpose of M. I understood the derivation given in the book. But my question is : isn't this condition true for any matrix M? That is it doesn't...

I was reading Feynman Diagrams and stumbled upon this query: If the electrons and protons interact by exchange of photons, does the electron inside an atoms also interact with the nucleus with a similar kind of exchange?

I am trying to use Kepler Data for Eclipsing Binaries to estimate time period, and then other parameters such as mass, eccentricity, semi-major axis, distance, etc. of the binary systems. I want to write code in MATLAB which will use FFT to find the time period. The available data has the...

I know lagrangian and hamiltonian dynamics and I need a graduate level answer. I do not have any knowledge of field theory, but I can understand the four-vector notations (I did a course on special theory of relativity.)

Hi I need a little help in my homework. It is not a direct problem to be solved. Rather I am supposed to find an application of Noether's theorem. All the article or papers I have found are very difficult for me to understand. In fact, I still don't understand any application of Noether's...