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 Yearling
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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
Apr
2
reviewed Close Dirac quantization condition for magnetic monopoles how is obtained?
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
Oct
24
comment Does a force really act on a body during a collision?
Comments are not for extended discussion; this conversation has been moved to chat.
Oct
21
reviewed Approve Pattern on mesh office chair emulates thin film interference for curved surface. Possible to form an equation?
Oct
21
reviewed Reviewed how refraction takes place at atomic level?