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bio website motls.blogspot.com
location Czech Republic
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visits member for 4 years, 2 months
seen 14 hours ago

Hi, I am a string theorist and a publicist.


Mar
25
awarded  Good Answer
Mar
24
awarded  Enlightened
Mar
24
awarded  Nice Answer
Mar
18
awarded  Good Answer
Mar
17
comment Do photons with a frequency of less than 1 Hz exist?
Sorry, the second half of the answer is silly. There is absolutely no problem in producing photons of less-than-one-hertz frequency. Just oscillate with a charge at a frequency less than one hertz and be sure that lots of electromagnetic waves are produced. The waves are composed of many photons - at such low frequencies, we actually produce a huge number of photons. What is hard is to "count" them or experimentally prove that the number is integer - it is not hard to produce them.
Mar
13
comment Why the CMB has not been dispersed so far?
Or alternatively, imagine that the box is as huge as the whole Universe and you're inside it - imagine somewhere near the center. The radiation gets diluted as the box grows but you're still inside it and the radiation is still coming from all directions.
Mar
11
answered Decomposition of group representation using tensor method
Mar
7
awarded  Enlightened
Mar
7
awarded  Nice Answer
Mar
5
awarded  Nice Answer
Mar
1
comment Can Maxwell's equations be derived from Coulomb's Law and Special Relativity?
Dear @Stan, I am confident that most experts with 5,000+ cits on quantum gravity papers will agree with me that magnetic monopoles are unavoidable in quantum gravity. It's really because you may create black holes with a confined magnetic flux - imagine two end points of a big bar magnet separately collapse into black holes. So these objects exist in the form of black holes and even if and when the black hole evaporates all the particles with $Q_m=0$, something with $Q_m\neq 0$ has to be left, anyway. The magnetic monopole elementary particles may be identified with the lightest BH microstates
Feb
28
awarded  Nice Answer
Feb
24
awarded  Enlightened
Feb
24
awarded  Nice Answer
Feb
21
awarded  Nice Answer
Feb
20
comment Is the wave-particle duality a real duality?
@StanShunpike - the wave-particle duality has never been a "problem", it's been a defining feature and virtue of quantum mechanics (or "quantum theory") since the beginning. Even non-relativistic quantum mechanics describes the objects so that they have both wave-like and particle-like properties. Quantum field theory does the same - while it's also easier to describe all the collections of particles as a "quantization of a classical field" (or "of classical waves"). But when it comes to basic conceptual properties like the co-existence of wave-like and par-like properties, QFT changes nothing
Feb
19
comment How to get Planck length
No, it doesn't sound like astrology (it sounds like fundamental and demonstrable science) and your question should have contained "doesn't it" rather than "isn't it".
Feb
17
awarded  Enlightened
Feb
17
awarded  Nice Answer
Feb
14
comment Why quantum electrodynamics?
Something is traveling in between the source and the other charge that reacts. It's the perturbations of the fields. If the charges are static (time-independent), then the fields inside are also static, so they appear not moving. But if the charged source starts to wiggle, there are literally electromagnetic waves propagating in between, by the speed of light. In QED, electromagnetic waves are reinterpreted as a collection of an integer number of photons, they also move by the speed of light.