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Apr
17
comment Can energy be extracted from clouds?
Quote: "The electric energy built up can also be lost in other ways (i.e. Lorentz force)." No, Lorentz force is perpendicular to the velocity vector of charged particles and thus does not add or remove particle energy.
Apr
16
revised Why have our eyes not evolved to see “gluons”?
added 48 characters in body
Apr
15
answered Why have our eyes not evolved to see “gluons”?
Apr
14
revised Why does the Michelson-Morley experiment only contradict the aether?
Correct typos.
Apr
14
suggested approved edit on Why does the Michelson-Morley experiment only contradict the aether?
Apr
9
comment How far from the LIGO event would we have to be to hear it?
@DirkBruere I would not assume moving mirrors. What was measured was a phase shift in an electromagnetic wave traveling along perpendicular paths. The GW modified the space-time along that path; that's not the same as moving mirrors in an otherwise constant space-time metric.
Apr
9
comment How far from the LIGO event would we have to be to hear it?
@DirkBruere Does the "trivial thought experiment" take into account that the GW not only affects the mirrors, but also the volume of air? Don't think of the mirrors as a speaker membrane! The GW compresses all the space at nearly the same time. Where does the pressure differential come from?
Apr
9
comment How far from the LIGO event would we have to be to hear it?
@DirkBruere But then you don't hear the GW. A 300Hz sound wave has a 1m wavelength. A 1m GW has a frequency of 300MHz. On the other hand, a 300Hz GW has a wavelength of 1000km and that's impossible to hear as a sound wave.
Apr
9
answered How far from the LIGO event would we have to be to hear it?
Apr
7
answered Capture the entire light field of a 3D scene and construct a virtual scene
Mar
11
revised How to calculate the force of gravity that wants to collapse a star?
Correct grammo.
Mar
11
suggested approved edit on How to calculate the force of gravity that wants to collapse a star?
Feb
23
comment Perpetual motion machine
y-projection? Which direction is y?
Feb
19
comment Could neutrinos be used to take high resolution pictures of atomic nuclei?
@AccidentalFourierTransform Well, what if? Then we'd be in 100% speculation land. My answer tries to use existing knowledge to deduce a likely answer. Like everything in physics, the answer cannot be considered final. Your remark is intriguing nevertheless!
Feb
19
answered Could neutrinos be used to take high resolution pictures of atomic nuclei?
Feb
17
revised Is the length of the day increasing?
Make unit match the claim below, of 38mm, which is more in-line with reality.
Feb
17
suggested approved edit on Is the length of the day increasing?
Feb
17
revised Can gravitational wave be used for data transmission?
added 42 characters in body
Feb
16
answered Can gravitational wave be used for data transmission?
Feb
14
revised Why don't gravitational waves free stream
Improve grammar and orthography.