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HNQ
12:18 AM
2
Q: Length contraction of a physical object

ghogohIn a peer-reviewed publication, one of the length-contraction effects of a physical object, depicted in the diagram, is used to derive conclusions. It has been referenced by other authors and in Wikipedia. The paper is not identified here intentionally, hopefully, to avoid bias in possible explan...

 
 
3 hours later…
HNQ
3:32 AM
2
Q: Confusion about modes and quantum field theory

David LI'm learning quantum field theory from P&S and Srednicki. I'm having a lot of difficulties understanding the concept of a momentum state. In particular, I'm confused about how to interpret the integration over momentum space that one frequently encounters as opposed to the discrete sum and occupa...

 
 
8 hours later…
HNQ
11:36 AM
2
Q: Since the speed of light is constant and also the speed limit; would you, in your reference frame, have no upper bound on your speed?

Michael KingLet us imagine you are in a vacuum and after having maintained a speed of 0 km/s (standing still) you accelerate to 297,000 km/s (99%). You know this is now your speed because you have a speedometer telling you so. You then decide to maintain that speed for a while. With the speed of light is alw...

 
HNQ
12:00 PM
2
Q: What are the lorentz transformations for polar coordinates?

silverrahulIs there a reason i cant find anywhere the lorentz transformations for polar coordinates? I can only find the lorentz transformations for cartesian coordinates. Can anyone guide me on how to transform polar coordinates, or is the only way to convert them to cartesian coordinates first and then tr...

 
 
4 hours later…
HNQ
3:40 PM
2
Q: If the Higgs field gives particles mass, and is present everywhere, then why are there massless particles?

Brien LimI was reading this article that said Imagine that all of space is uniformly filled with an invisible substance—now called the Higgs field—that exerts a drag force on particles when they accelerate through it. Push on a fundamental particle in an effort to increase its speed and, according to Hig...

 
 
6 hours later…
HNQ
10:07 PM
4
Q: Do spinors form a vector space?

iSeekerIn contradiction to a number of other authors (sample ref below), Gerrit Coddens, at France’s prestigious Ecole Poytechnique, asserts that: 2.2 Preliminary caveat: Spinors do not build a vector space As we will see, spinors in $SU(2)$ do not build a vector space but a curved manifold. This is alm...

 
HNQ
10:32 PM
2
Q: Is being "stationary" also an example of a "periodic motion"?

AnkitI read an idea in mathematics about periodic functions that a constant function is also a periodic function with an undefinable period. So , suppose a body is at rest (for an observer). This means that it's position doesn't change with time for that observer. So everytime the observer sees the bo...

 

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