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seen Oct 19 '13 at 6:31

Aug
8
awarded  Yearling
Aug
16
answered Magnetic moment of electron
Aug
8
awarded  Yearling
Aug
8
comment The Momentum Operator in QM
@Tony No, it doesn't. Applying the momentum operator to the wavefunction is equivalent, as shown above, to taking the gradient and then multiplying by $ \hbar \over i $. There is still a momentum that you can measure - but that is an eigenvalue of the momentum operator.
Aug
8
answered What would earth look like if traveling at 77% the speed of light?
Aug
7
answered The Momentum Operator in QM
Sep
5
answered Observable universe does it account for farther away galaxies measure of the observable universe?
Aug
25
comment Has the speed of light changed over time?
@lurscher Why do you think it is more valid to say that the speed of light changed, rather than the wavelength of the sodium line, or the half-life of the ammonia resonance? I could choose to try to measure the wavelength of said sodium line using light, and conclude that it varied, not the speed of light. I don't agree with your point.
Aug
25
revised Has the speed of light changed over time?
added 1782 characters in body
Aug
25
answered Has the speed of light changed over time?
Aug
16
answered How is light affected by gravity?
Aug
15
comment Why is Neutron Heavier than Proton?
Well, you're right that we haven't observed it, but it would be very hard to make sense of the asymmetry of matter and anti-matter if protons don't decay (since that would imply baryon number is conserved).
Aug
15
answered A relative time dilation paradox.
Aug
14
revised Could the Heisenberg Uncertainty Principle turn out to be false?
edited body
Aug
14
answered Space Expansion vs. Relative Motion
Aug
14
comment Is it possible to build an instrument which can travel faster than light?
Also, note that neutrinos do not travel faster than light. There was a measurement error at CERN, a loose cable.
Aug
14
answered How to make a monopole magnet?
Aug
14
revised Could the Heisenberg Uncertainty Principle turn out to be false?
added 1813 characters in body
Aug
14
comment Could the Heisenberg Uncertainty Principle turn out to be false?
@drake Right, I 100% agree. The HUP can be deduced from both wave mechanics and matrix mechanics, so it's quite clearly a fundamental part of QM.
Aug
14
comment Could the Heisenberg Uncertainty Principle turn out to be false?
@drake You can't derive it from the SE, but from the wave mechanics formulation (which is what I guess Annix means). See the'Proof of Kennard Inequality using Wave Mechanics' sub-section here: en.wikipedia.org/wiki/… However, I agree with you that the HUP is fundamental (see my above post.).