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Questions related from Arbab I. Arbab
Magus found a force on a spinning particle. It is a lift force that acts along a direction perpendicular to the particle linear velocity and its rotational velocity. Does it have a quantum...
01 January 2019 7,205 3 View
A black-body absorbs and re-emit radiations at all wavelengths. The intensity due to a black-body is due to Boltzmann-Stefan law. Metals are modeled by a system of free electrons. The uppermost...
04 April 2018 5,411 0 View
Light is known to be massless in vacuum. However, when it enters a conductor, does it still have zero mass? In a transparent medium, the speed of light is less that c, which would imply that light...
01 January 2018 5,455 17 View
According to classical electrodynamics theory, an accelerating charged particle emits an electromagnetic radiation. Unruh on the other hand found that an accelerating observer (charge) will find...
11 November 2017 2,763 8 View
In electromagnetism, a free moving particle charged particle has its electric and magnetic fields perpendicular to each other, and to the particle velocity. Is this true even if the photon is...
07 July 2017 3,286 5 View
A conservative force is define as a negative of a gradient of a scalar. Is it possible to define a force as a curl of a vector? If so, what does that force mean? I found a relation connecting the...
06 June 2017 7,594 0 View
In Hall effect, an applied magnetic field induces a transverse voltage in a sample. However, Faraday's law states that a time varying flux creates a voltage. Is it possible to incorporate Hall...
06 June 2017 3,405 5 View
We all know that heat is some sort of energy. While energy is transmitted as a wave following the wave equation, heat follows diffusion equation. In Seebeck and Peltier effects, heat flow is...
05 May 2017 9,785 13 View
A material found where electric field induces a magnetization, and a magnetic field induces a polarization. This is against the ordinary material where polarization is induced by electric field....
05 May 2017 2,633 5 View
The refractive index is obtained owing to classical electrodynamics. Is there any way to know how much momentum the electron gains when light incident on a dielectric material? How does the...
04 April 2017 8,959 4 View
A moving electron has both electric and magnetic fields that are perpendicular to its velocity direction. Does the electric field create a torque on the electron? If so what is that torque? Does...
04 April 2017 4,712 8 View
A single particle is known to have a zero dipole moment but a non-vanishing magnetic dipole moment. We have found that the electric dipole moment points along the velocity direction so it gives...
04 April 2017 4,243 9 View
It is found recently that the core of neutron star is in a state of superfluidity (superconductivity). How much the electric conductivity of white dwarf and neutron stars as compared to normal...
03 March 2017 9,118 3 View
In Dirac theory the electron has a spin degree of freedom. The question is: Do electric and magnetic fields created by an electron in a given frame of reference depend on the electron spin? If...
03 March 2017 2,924 8 View
It is understood that the Cooper pairs in a superconductor are connected by phonon. Why not by some charged massive bosons?
12 December 2016 8,822 13 View
When a magnetic field is applied transverse to a sample, a transverse voltage is developed without current. This voltage is termed Hall's voltage. In the same manner the displacement current...
10 October 2016 1,485 7 View
The skin depth is defined for a conductor as the distance reached by the wave when its amplitude is decreased by 1/e of its previous value. How one defines this for a semiconductor and does it...
12 December 2015 8,152 3 View
Photons in free space are massless. In the photoelectric effect (in a conductor) the photon behaves like a particle...but is the mass of that particle? If so how does it depend on the refractive...
12 December 2015 7,219 6 View
Klein-Goron equation describes the propagation of a boson in vacuum. How does it look inside a medium?
12 December 2015 2,482 6 View
The optical conductivity measures the response of the material to light. It thus depend on the light frequency. It also depends on the absorption coefficient that depends on the refractive index...
12 December 2015 695 4 View
Michelson-Morely experiment could not prove the presence of the aether. But how does aether affect matter waves? Should we look for aether by influencing matter wave rather than light? I have...
09 September 2015 1,886 3 View
In Dirac theory the momentum and velocity are not related by the simple relation p=mv. Will it be useful to look for an acceleration operator ? In that case shall we define an inertia for the de...
09 September 2015 1,364 19 View
Cooper pairs are assumed to be paired due to phonon-electron interaction. In Josephson junction a critical current is developed with zero voltage. In a recent work I have found that there...
03 March 2015 3,131 5 View
Owing to particle-wave duality particles have wave nature, and waves have particle nature. Does that mean we can derive their underlining equations from each other, i.e. Maxwell from Dirac and...
01 January 2015 5,355 36 View
Maxwell's equations govern the dynamics of electromagnetic field produced by moving charges (particle). What will be these equations for antiparticle? for antimagnetic charge?
11 November 2014 399 2 View
London had used Maxwell's equation to come to his known equations. What if we use instead the symmetric Maxwell equations encompassing magnetic monopoles? Can we obtain magnetic pairs (monopoles)...
10 October 2014 6,017 5 View
Biot-Savart law gives the local magnetic field produced by moving charges. It doesn't distinguish whether the particle (charge) is fermion or boson, thought it implies implicitly that the particle...
10 October 2014 8,495 7 View
Do we really need energy to move the Earth around the Sun? If so how much is that power?
05 May 2014 8,211 1 View
Light experiences a redshift (blueshift) if it passes through a strong static gravitational field, as demonstrated by Einstein. Owing to gravity-electrostatic analogy, why does light not have the...
04 April 2014 9,903 14 View
Maxwell theory associate two fields with charges and Maxwell equations govern the evolution of these two fields.
03 March 2014 5,688 2 View
