2,609 reputation
11235
bio website
location
age
visits member for 3 years, 10 months
seen yesterday

Nov
13
reviewed Approve suggested edit on Property of $Cu$ so that it is used as target in in X-ray diffraction (XRD)?
Nov
13
reviewed Approve suggested edit on What can be seen with a 114mm Aperture 675x Zoom Telescope?
Nov
2
awarded  Great Answer
Oct
20
awarded  Announcer
Oct
20
awarded  Popular Question
Oct
18
awarded  Announcer
Oct
3
reviewed Approve suggested edit on If an antenna must be $\frac{1}{4}$ of the wavelength, how can car antennas be so small?
Sep
30
reviewed Approve suggested edit on Homemade Spectrometer
Sep
10
reviewed Approve suggested edit on ${1 \over T} e^{-i/T}$ for Boltzmann-Gibbs distribution
Sep
7
reviewed Approve suggested edit on Why the amount of entropy increase to a system is less when heat is added to a higher temperature system than to a lower one?
Sep
6
reviewed Approve suggested edit on Finding the current in a parallel circuit
Sep
6
reviewed Approve suggested edit on Do photons change velocity instantaneously?
Sep
3
awarded  Popular Question
Sep
3
comment Dark matter a medium for light propagation
@anna v, yes, ridiculous that you have too much pride for scientific and pedagogic honesty. I can quote from Jackson or Landau all day: "one should properly speak of the electromagnetic field Fuv rather than E or B separately." The electromagnetic field is absolutely mandatory given relativity, and has nothing to do with QFT. That said, it is completely specious to say that QFT is not "necessary" for answering the question. There are no "classical" qualifications made here. The question is about nature, and if QFT tells us something relevant about nature then so be it.
Sep
3
reviewed Approve suggested edit on Has the collapse of wave function due to observation been recorded?
Sep
3
reviewed Approve suggested edit on Magnet spinning between two other magnets
Sep
2
comment Dark matter a medium for light propagation
@anna v, they don't need a source, are you aware of electromagnetic radiation? Do you know the definition of "field" when you say "electric field" and "magnetic field"? Of course these guys are frame dependent which is why one should even classically talk about the 4-potential and the EM-field rather than its frame-dependent components. This is stuff you should know, which is way this discussion is bizarre. Are you really trying to argue that "electromagnetic field" is a non-classical concept?
Sep
2
comment Dark matter a medium for light propagation
@anna v, you are being stubborn and specious to no positive end. Even classically the EM field is a field, and fills all space by definition of "field," regardless of whether it has zero amplitude.
Sep
1
comment Dark matter a medium for light propagation
@anna v, classical fields are not the background of the question. The question is about nature generically, which we know is not classical.
Sep
1
comment Dark matter a medium for light propagation
Yes, and light is understood to be ripples in the EM field that permeates all of space. It is of course a Lorentz invariant field in accord with the Michelson Morley experiment.