Physics Questions & Answers

Is there an introduction to noncommutative geometry?
Is there an introduction to noncommutative geometry? I am looking for a simple explanation as how spectral triples give...

Why current density of a point charge satisfies $\vec{J}\rm{dV}=q\vec{v}$?
Why current density of a point charge satisfies $\vec{J}\rm{dV}=q\vec{v}$? I read in a book that if a point charge $q$...

will the charges in a hollow conductor feel a force from a charged body on the exterior side of the conductor?
will the charges in a hollow conductor feel a force from a charged body on the exterior side of the conductor? Imagine a...

why doesn't visible light help heat up objects, but infrared light can even though it is lower in energy state?
why doesn't visible light help heat up objects, but infrared light can even though it is lower in energy state?...

Current density in PN junction
Current density in PN junction I am currently reading through a semiconductor physics book and I am currently in a...

Curl on the time dependent dipole
Curl on the time dependent dipole I could not understand one step from the calculation. I think it might be taylor...

Which is the correct triangle to draw to derive the force component along a rope? [duplicate]
Which is the correct triangle to draw to derive the force component along a rope? [duplicate] When solving for the force...

Why does wavelength decide the size/diameter of these holes in the microwave door?
Why does wavelength decide the size/diameter of these holes in the microwave door? I've read here that microwaves are...

What is the closest an electron can get to a nucleus?
What is the closest an electron can get to a nucleus?...

Deeper meaning in Brachistochrone and Tautochrone being the same curve? [duplicate]
Deeper meaning in Brachistochrone and Tautochrone being the same curve? [duplicate] Is there any deeper physical meaning...

Simple harmonic motion differential equation and imaginary numbers
Simple harmonic motion differential equation and imaginary numbers The solution to SHM Differential Equation is...

What's the possible changes for future physics due to the discovery of metallic hydrogen?
What's the possible changes for future physics due to the discovery of metallic hydrogen? In recent days scientists...

“Red Hot” Objects & the Ultraviolet Catastrophe
“Red Hot” Objects & the Ultraviolet Catastrophe It is common for introductory courses in quantum physics...

Why does light ray not change direction when it pass though the curve part of the semi circular glass block?
Why does light ray not change direction when it pass though the curve part of the semi circular glass block? why does...

Is the Einstein A coefficient the same as the natural line width $\Gamma$?
Is the Einstein A coefficient the same as the natural line width $\Gamma$? Given a twolevel system, the rate of decay...

How can Higgs Field contribute to the vacuum energy density if its vev is zero?
How can Higgs Field contribute to the vacuum energy density if its vev is zero? I am thinking about all the possible...

Energy and Method used for Plasma separation in Ion thrusters?
Energy and Method used for Plasma separation in Ion thrusters? When I was thinking about Ion thrusters and their energy...

Surface brightness [closed]
Surface brightness [closed] I have to compute the surface brightness as a function of the radius from the following set...

Schrödinger equation [closed]
Schrödinger equation [closed] Initially, we derive two dimensional equation for SchrÃ¶dinger time independent...

massless rope that attaches crates , masses and blocks
massless rope that attaches crates , masses and blocks In exercices that involves crates , sliding , ropes and pulleys ,...

Does water expand uniformly in a rigid container that is open on one end?
Does water expand uniformly in a rigid container that is open on one end? Lets say there is a semirigid container (made...

Simple harmonic motionneed some clarification [duplicate]
Simple harmonic motionneed some clarification [duplicate] I was told that the motion of a simple pendulum is harmonic...

Reference request for nonperturbative QCD
Reference request for nonperturbative QCD I am looking for some good books or lecture notes that discuss...

derivation of navigation equation and specific force
derivation of navigation equation and specific force I want to process accelerometer and gyroscope data. To correctly...

Why is it more difficult to raise the temperature when the degrees of freedom are higher?
Why is it more difficult to raise the temperature when the degrees of freedom are higher? Some materials are hard to...