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Physics : Recent Questions and Answers (Page 656)

Find answers to your questions about Physics or help others by answering their Physics questions.

How to determine interplanar spacing for BCC/FCC crystals?

I have a query as to how interplanar spacing in fcc and bcc can be determined. In line with the known formula,$$d_{hkl} = frac{a}{sqrt{h^2+k^2+l^2}}$$for a crystal with Miller indices...

Asked on 01/13/2021 by Prathamesh

1 answer

What is the probability of finding an electron in a hydrogen atom in an infinitesimal space $dV$?

I have been asked to find the most probable position of electron in infinitesimal space $dV$ orbiting a Hydrogen atom. I know that probability $P$ of finding...

Asked on 01/13/2021 by majyno

1 answer

What are the two different $mathbb{S}^n$ in the construction of the homotopy group $pi_n(mathbb{S}^n)$ that classifies topological defects?

According to Mukhanov's Physical Foundations of Cosmology,Homotopy groups give us a useful unifying description of topological defects. Maps of the $n$-dimensional sphere $mathbb{S}^n$ into a vacuum manifold ...

Asked on 01/13/2021

1 answer

Can electrons be electrically polarized, i.e., can they acquire an induced electric dipole moment?

A comment on a recent question raises an interesting point:Neutrons can have intrinsic electric dipole moments.Neutrons also have a nonzero electric polarizability, i.e., they acquire...

Asked on 01/13/2021

1 answer

Partial Wave Analysis and Born Approximation

im currently studying about scattering and there is something that is troubling me. The book im reading has been making a distinction between the Born approximation and partial wave analysis....

Asked on 01/13/2021

0 answer

Eigenfunction of a wave function with boundary condition

I read a paper about boundary conditions and imaginary potentials. In this paper the author considers a single, non-relativistic quantum particle of mass $m > 0$ in $1$...

Asked on 01/13/2021 by karla.tr

1 answer

Ensambles equilibrium properties(density matrix)

I am currently studiying ensambles and their conecting density matricies. In this notes:https://www.classe.cornell.edu/~dlr/teaching/p6574/lectures/lecture2.pdfthey derive the density matrix first by not demand that the energy is fixed and...

Asked on 01/13/2021

0 answer

If an astronaut got stuck in the middle of a space station, can he propel himself towards a wall by blowing air out of his mouth?

Consider the astronaut as floating in the middle of the "Kibo" (ISS module) without him having any initial motion. The module has a diameter of 4.2 m (inner), and the...

Asked on 01/13/2021 by Adriel Mattheuz Estolano

1 answer

Discontinuity at the transition between the inflationary and radiation-dominated universe

Inflation is thought to be an extraordinarily brief period during the very early universe when the scale factor increased a remarkable $e^{60}$-fold, however this also comes with a corresponding...

Asked on 01/13/2021 by Kris Walker

1 answer

Capacitor with intially having charge $q$ on both plates and then battery connected

What would happen to capacitance and other quantities like Voltage if I initially take a Parallel Plate capacitor with each plate having equal charge "$q$" and then connect it...

Asked on 01/13/2021

2 answer

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