Recent content by benagastov

Good evening, Now I start learning Quantum Espresso and I tried to install it on Google Colab, since I already get convenient and its my habit to do all computation in Physics using google Colab. Sometimes I rent cloud gpu if I need bigger RAM and GPU when I have heavy load. You can see the...

After I finished preparing gas chamber for testing optical fiber as gas sensor, my supervisor asked me to measure the difference of refractive index from several optical fiber with different coatings. I knew there is Evanescent Field and Skin Depth effect, but what kind of mathematical formula...

Ok, I am sorry took so long. After I discharged from hospital, I took rest time. So I think I already finish the formula, is this Blue Shift? What I do next? There is no mass in my question.

Thank you for your reply! Is this how I do it? I use Bose_einstein statistics since it was Photon

I found there is kind of solution in Pointon's book: An Introduction to Statistical Physics for Students. But I don't know how to find intensity by using frequency.

Thank you, the d) is the correct one (with 271 states). My Latex is wrong, sorry ##100 ≤ n_x^2 + n_y^2 + n_z^2 ≤ 136## And with degeneracy, I still don't know how to calculate it in around 25 minutes. Would you mind to show me how to solve it faster? What I know is the maximum nx, ny and nz is...

I tried to find states in direct method using ##\frac{E}{E_0}=\:nx^2+ny^2+nz^2## and ##100\:<nx^2+ny^2+nz^2\:<\:136## But it was too long, found it using phi approximation there are around 300 energy states, and Python find around 271 states using direct method but I need manual or recursive...