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Questions related from Hossein Javadi
Over the past century, much effort has been put into defining the particle. Various definitions have been proposed in this issue, including point-like, wave function collapse, quantum field...
04 December 2021 6,899 3 View
If so, what means massless photon? If no, why a moving photon has the mass equal to m=E/c^2? 'The theory of relativity deduces, from its fundamental assumption, a clear and convincing answer to...
23 May 2018 6,942 71 View
A brief overview of the cosmological models, it is well illustrated that our cosmological knowledge is the cognitive function we have acquired on the earth. Ptolemy's cosmological model was...
28 April 2018 8,610 11 View
There is still no consensus on whether the fields are composed of particles or no. For examples: Art Hobson, There are no particles, there are only fields, American Journal of Physics 81, 211...
17 February 2018 3,921 11 View
"All our theories today seem to imply that the universe should contain a tremendous concentration of energy, even in the emptiest regions of space. The gravitational effects of this so-called...
16 February 2018 6,463 38 View
The Standard Model of particle physics describes the universe in terms of Matter (fermions) and Forces (bosons). Particles of matter transfer discrete amounts of energy by exchanging bosons with...
23 December 2017 1,775 9 View
Usually, this phenomenon is explained by relativistic mass of the electron. How can we describe it by zero rest mass of the photon?
22 December 2017 8,995 53 View
Why dark energy produces a repulsive force field is a bit complicated. Quantum theory says virtual particles can pop into existence for the briefest of moments before returning to nothingness....
16 October 2017 9,730 9 View
Quantum field theory comes from starting with a theory of fields, and applying the rules of quantum mechanics. A field is simply a mathematical object that is defined by its value at every point...
22 January 2016 7,289 39 View
Once a photon of light is born, it travels at a speed of 300,000 km/sec until it collides with a charged particle and is diverted in another...
28 December 2015 8,096 48 View
The Nobel Prize in Physics 1965 was awarded jointly to Sin-Itiro Tomonaga, Julian Schwinger and Richard P. Feynman "for their fundamental work in quantum electrodynamics, with deep-ploughing...
07 December 2015 2,752 98 View
Symmetries are not hard to find. Plates in the china shop look the same when rotated; serving platters are identical to their mirror reflection. But much of the world is messy and asymmetric, and...
30 October 2015 7,085 17 View
"Two pieces of matter that are close to each other have less [positive] energy than the same two pieces a long way apart, because you have to expend energy to separate them against the...
25 October 2015 8,708 34 View
WE ARE born. We die. We call the span that separates these events time. Its passage is perhaps the most fundamental feature of our human experience, yet we are incapable of saying exactly what it...
01 January 1970 6,604 98 View
At the beginning of the 20th century, Newton’s second law was corrected considering the limit speed c and the relativistic mass. At that time there has not been a clear understanding of the...
01 January 1970 2,181 21 View
“Those photons are said to be virtual because the ground state cannot radiate. Their presence can be however directly revealed when the system parameters are non-adiabatically modulated in time,...
01 January 1970 3,524 6 View
https://www.quora.com/What-are-the-basic-elements-that-must-be-available-in-the-theory-of-everything/answer/Hossein-Javadi-1?share=7f7b7870&srid=F7rA What is a theory of everything? “A Theory...
01 January 1970 7,217 6 View
01 January 1970 772 27 View
Scattering of light by matter has been studied extensively in the past. Yet, the most fundamental process, the scattering of a single photon by a single atom, is largely unexplored. One prominent...
01 January 1970 6,587 15 View
https://www.researchgate.net/post/In_the_cosmological_equation_what_is_the_relationship_between_vacuum_energy_and_cosmological_constant
01 January 1970 3,483 37 View
01 January 1970 5,781 3 View
01 January 1970 7,925 3 View
