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HNQ
12:51 AM
2
Q: Do QFT Fields Constitute an Ether?

CSnowdenAs all pervasive, stationary fields, do the QFT fields (various Quark, electron, EM, etc.) constitute the modern equivalent of the traditional ether concept?

 
 
6 hours later…
HNQ
6:44 AM
4
Q: Riemann curvature tensor and parallel transport

EricI'm taking a course on general relativity and I'm confused about something in my course notes. First there is an explanation about a curved 2D plane where it is shown how curvature can be defined by using parallel transport along a closed circuit. This yields one scalar value that characterizes t...

 
 
6 hours later…
HNQ
12:55 PM
1
Q: Conversion of mass into energy with 100% efficiency

MaheshSuppose you are given a mass of 1kg. Einstein's theory of relativity says that all the mass can be converted into energy as per equation $E = mc^2$. So If you want to convert this whole mass of 1kg into energy, what will you do to that mass?

 
 
3 hours later…
HNQ
4:01 PM
3
Q: Is the speed of light in all media independent of reference frame?

M. Guru VishnuWe know that, the speed of light in vacuum is independent of reference frame. I read the reason for this fact from Why and how is the speed of light in vacuum constant, i.e., independent of reference frame?. Similarly, is the speed of light in a medium of refractive index $n \neq 1$ also independ...

 

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