direction of a photon created by bremsstrahlung radiation?
basically any time i have an arc, i have electrons flowing in the opposite direction to the field gradient. so when the electrons reach the other side, they will be stopped, which will then produce an...
View ArticleState in electrodynamics
I have so far encountered the notion 'state' in classical mechanics, thermodynamics and quantum mechanics. I have, however, not seen this notion in the context of electrodynamics. Is there such a thing...
View ArticleMie scattering for sphere with constant dipole moment
Hi does anybody here know whether there already exists a theory that describe Mie scattering for spheres that have a constant dipole moment?
View Articlesynchrotron radiation vs cyclotron radiation?
both involve a charge carrier undergoing centripetal acceleration thereby producing radiation from the acceleration; so what's the difference?
View ArticleKinetic energy loss in a gravitational field.
If I throw a ball vertically upwards from the surface of the earth, the upward motion slows due to gravity. At the ball's highest point, I have placed a repositioned platform for the ball to rest on;...
View ArticleSome questions about Hard-sphere Maxwellian Gas Collisions
Consider a unit volume (rigid walled container of surface area S) containing N molecules with diameter d, having a maxwellian speed distribution with a mean time between collisions t*. Allowing for a...
View ArticleDeriving Hamilton's Equations from Conservation of Energy
This is an attempt by a novice to do something neat. Please feel free to correct me. I am trying to see if one can derive the Hamiltonian equations of motion from a simple statement of the conservation...
View ArticleGauge transformation
I understand ##\vec A\rightarrow\vec A+\nabla \psi\;## as ##\;\nabla \times \nabla \psi=0##[tex]\Rightarrow\;\nabla\times(\vec A+\nabla \psi)=\nabla\times\vec A[/tex] But what is the reason for...
View ArticleEntropy of a vacuum and heat death of the universe
According to the third law of thermodynamics, one could argue that a vacuum has zero entropy, since it has only one ground state and a temperature at absolute zero. However, assuming the accelerated...
View Articleangular acceleration from change in angular velocity and angle
Is there a way to calculate angular acceleration from the change in angular velocity and the change in the angle without considering time? How would you accomplish this?
View ArticleConfirmation of understanding of electrodynamics
Hi I'm trying to get my head round why Maxwell's equations fail for the electron going round the atom. The common sentence I see is along the lines of: "Accelerating charges emit electromagnetic...
View ArticleUnderstanding Energy (kinetic and potential)
I have these two problems on energy where I just don't totally understand the explanations given. One goes: (With a diagram showing a 14kg mass suspended 5m above the ground by a zero-mass rope,...
View Articleg within a thin disk
I'm researching dark matter and how it affects galaxy rotation curves, I came up with the problem below. Imagine a very thin, flat disk which has uniform mass per unit area. What is the gravitational...
View ArticleHooke's Law of a spring with a mass
Hi, I know that for a massless spring the tension is T = kx, where k is a constant and x is the compression or elongation. What is the expression of the tension if the spring has a mass m? Thanks in...
View ArticleOne satellite, two planets and movement
I am trying to write a program to show the flight of a satellite in the neighbourhood of two large planets. In all of this the mass of the satellite is negligible. I have the potential energy from...
View ArticleQuestions related to magnetism
I'm studying magnetism from my textbook, and I have several doubts. 1. Magnetic flux in my textbook is defined as the number of magnetic field lines passing through a surface held perpendicular to the...
View ArticleThin film interference
Trying to get my head around constructive/destructive interference in thin film optics. The book does a good job of throwing formulas at you but I want some intuition. If we shine a laser with λ = 600...
View ArticleAbsorption coefficient of aluminium for microwaves
I am looking for an exact value of absorption coefficient of aluminium for microwaves, but I can not find it in the internet. Anyone knows where I can find it?
View ArticleThermal radiation of neutrons
All bodies with a temperature emit electromagnetic radiation also known as thermal radiation or blackbody radiation. If I understand it correctly, the origin of this is the thermal motion...
View Articlehow much heat a bar is putting out?
If you know how much heat a bar is putting out, what is the temperature at the center of the bar?
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