Debangshu
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 Feb 4 awarded Commentator Feb 3 comment Difficulty in visualizing more than three spatial dimension I still don't understand the question... Jan 31 revised Equation $H(q,p)=E$ is the equation of motion or energy-conservation law? latex editing Jan 31 suggested approved edit on Equation $H(q,p)=E$ is the equation of motion or energy-conservation law? Jan 31 asked How do I show that there exists variational/action principle for a given classical system? Jan 31 awarded Editor Jan 31 revised Equation $H(q,p)=E$ is the equation of motion or energy-conservation law? added 9 characters in body Jan 31 answered Equation $H(q,p)=E$ is the equation of motion or energy-conservation law? Jan 31 comment What if the strong force gave up? Is this a serious question? Jan 30 comment How to calculate the force acting on a magnet placed in a magnetic field? I would say, this is kind of a tedious algebra which has been worked out in details in Julian Schwinger's book, Classical Electrodynamics Chapter 4-Macroscopic Electrodynamics Section 4.2. Here, first Schwinger has discussed the force on an atom due to an external electromagnetic field. Then, to find the force on a finite volume element he has integrated that force over the total volume with $n(\mathbf{r})$ as the number density of the molecules. You also need to define quantities like magnetic/electric dipole moment for the macroscopic body Jan 30 answered How to calculate the electric field at a point in space Jan 29 answered About constructing potential energy functions Jan 29 comment How to calculate the electric field at a point in space Did you mean that you have to find the field at the origin? May 3 comment Which Mechanics book is the best for beginner in math major? I never knew Spivak wrote on Class Mech!!! :-) Apr 27 comment What exactly is meant by the “Gaussianity” of CMBR? I saw Liddle and Lyth and the way dbrane defined Gaussianity is quite correct (at least according to Liddle and Lyth) however, I have issues regarding dbranes comment "Fourier modes being uncorrelated is precisely equivalent to statistical homogeneity & isotropy, and is completely independent of Gaussianity." Komatsu's review article clearly says the non-correlated Fourier mode is a result of Gaussianity! Apr 27 answered Which Mechanics book is the best for beginner in math major? Apr 25 comment What exactly is meant by the “Gaussianity” of CMBR? Thanks a lot again :-) Apr 25 comment What exactly is meant by the “Gaussianity” of CMBR? Thanks a lot! I still do not get how we are going to connect the experimental observation with the data. In experiment, we measure $\langle T(\hat{n})T(\hat{n^{\prime}})\rangle$ while theoretically, we are calculating $\langle \delta \phi_{k} \delta \phi_{k'}\rangle$. How should we relate these? Apr 25 awarded Scholar Apr 25 accepted What exactly is meant by the “Gaussianity” of CMBR?