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Apr
19
comment Will it ever be possible to observe the cosmic neutrino background?
The IceCube South Pole Neutrino Observatory already reported the first observations of cosmic neutrinos last Noveember. In fact, it was deemed the biggest breakthrough of 2013.
Apr
18
comment double of temperature
The Celsius temperature scale is a difference scale, not a ratio scale. Try doubling $0^\circ$ C.
Apr
17
comment Why uncertainty principle is not like this?
Because the fundamental equation of quantum mechanics is $[\hat A,\hat B]=i\hbar \hat I$, for conjugate variables $\hat A$ and $\hat B$.
Apr
12
comment De Broglie Wavelengths
See wiki for info on wavenumber and wave vector.
Apr
12
comment About the speed of light
See relativistic rocket.
Apr
11
comment Is there any general position function $x(t)$ that gives the solution to $x''(t) = k/x(t)^2$, where k is a constant?
Try multiplying by x' and integrating
Apr
6
comment Photons and Black holes
Grammar nazi here. There is a big difference between energy which bends spacetime and energy witches bending spacetime.
Apr
6
comment Gauss' Law for Magnetism Derivative Form: With or without volume integral?
They're equivalent alright. This is exactly how you go between the integral and differential formulations of Maxwell's laws.
Apr
6
comment Hamiltonian Operator Interpretation of Quantum Anomaly
A quick google search turned up this article: link.springer.com/article/10.1007%2FBF01466595. Sadly, only a preview is freely available, which is a shame since it appears exactly what you're looking for.
Apr
6
answered What prevents an orbiting object from getting a speed which is greater than $c$?
Apr
5
comment Is the Higgs field part of space?
Fields aren't elements that make up space. Rather, they are conditions on space. Think of them as mathematical functions that assign a physical quantity to each point in space and time. For instance, the electric field assigns an electric field vector to each point of space. The Higgs field assigns four component complex scalar from SU(2) to each point of spacetime, instead of assigning a vector to each point. So we call it a Higgs field instead of a vector field.
Mar
30
comment What is Fermi energy and Fermi level?
Please, there's no need to shout.
Mar
30
comment Principal value of 1/x and few questions about complex analysis in Peskin's QFT textbook
Unfortunately, there are two completely unrelated meanings of the term "principal value". The kind referred to here is the Cauchy principal value, which assigns values to otherwise undefined improper integrals. This has nothing to do with the principal value you had in mind, which is for selecting single-valued branches of multi-valued functions. I know, it's stupid. You'd think someone would have fixed all these weird ambiguities by now, but alas math is not French.
Mar
30
comment Rutherfords alpha scattering conclutions?
Rutherford observed a lot of things over the years. Could you be a little more specific about the physics you're asking about?
Mar
29
comment Could elementary particles join to create bound states?
@jinawee Electrons do "feel" the weak force. Two electrons can interact via exchange of virtual Z bosons, though the amplitude of this interaction is negligible compared virtual photon process accept at high energies.
Mar
29
comment Could elementary particles join to create bound states?
The weak interaction does not produce bound states at all.
Mar
29
revised Electromagnetic force interaction
added latex; other small fixes
Mar
29
suggested suggested edit on Electromagnetic force interaction
Mar
24
comment Electromagnetic force interaction
A hydrogen atom is one proton plus one electron, so its overall electric charge is zero. But even though hydrogen atoms are neutral, the electric force will bind two hydrogen atoms together to form molecular hydrogen, $H_2$.
Mar
24
comment How do you measure a particle's postion or momentum?
The crux of the problem is that in order to measure the position accurately, you need to bounce low wavelength light of the particle. But to measure momentum accurately, you need low frequency light instead.