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Apr
18
comment Why does string theory require 9 dimensions of space and one dimension of time?
@Jiminion As in you have to arbitrarily label them; there isn't a universal "up".
Apr
2
reviewed Reopen Are the particle-wave duality and the quantum uncertainty principle united?
Apr
2
reviewed Looks OK Discovery of spin-3 particle at LHCb
Apr
2
reviewed Reviewed Significance of Reversible and Irreversible Process
Apr
2
reviewed Reviewed Does this identity that applies to the metric tensor also apply to the stress-energy tensor?
Apr
2
reviewed Close How high could i jump if I weighed only half as much?
Apr
2
reviewed Close Prove that $(e^{i\lambda A})^\dagger=e^{-i\lambda A^\dagger}$
Apr
2
reviewed Close Proton creation
Apr
2
reviewed Leave Open Entanglement ladder algebra and quantization of entanglement
Apr
2
reviewed Close Calculating imaginary part of a loop diagram using cutting rules for phi^4 theory
Apr
2
reviewed Close $N>2$ gravitating masses can never reach equilibrium
Apr
2
reviewed Leave Open Does the speed of light have a range of speeds due to medium-dependency?
Apr
2
reviewed Close Are black holes an infinite source of energy?
Apr
2
reviewed Close Metric and the Lagrangian
Mar
26
comment Could we send a man safely to the Moon in a rocket without knowledge of general relativity?
Comments are not for extended discussion; this conversation has been moved to chat.
Feb
26
comment Are universally valid possibilistic theories possible?
This seems metaphysical to me.
Jan
31
awarded  Yearling
Nov
1
comment Have red shifted photons lost energy and where did it go?
@bobie Asymptotic is asymptotic, regardless of the size. I never didn't accept that energy can be drained out. It can. However, again, the photon started with a net negative "potential energy", so everything evens out.
Nov
1
comment Have red shifted photons lost energy and where did it go?
@bobie It can't be completely drained out until it reaches infinity (or if it is beyond an event horizon). General relativity doesn't have a nice concept of "potential energy", however remember that a gravitational well has negative PE, so throwing an energetic photon up (and having it redshift into oblivion) conserves energy.
Oct
31
awarded  Nice Answer