Zobrazeno 1 - 10
of 72
pro vyhledávání: '"Ashok K. Singal"'
Autor:
Ashok K. Singal
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 4, Pp 1-8 (2024)
Abstract The horizon problem, encountered in cosmology, is derived as such for world models based on Robertson–Walker metric where homogeneity and isotropy of the universe is assumed to begin with and is guaranteed for all epochs. Actually, the onl
Externí odkaz:
https://doaj.org/article/f6dbcf7eeee34920958600f33e4c2f15
Autor:
Ashok K. Singal
Publikováno v:
Universe, Vol 7, Iss 4, p 107 (2021)
According to the Cosmological Principle, the Universe is isotropic and no preferred direction would be seen by an observer that might be stationary with respect to the expanding cosmic fluid. However, because of observer’s partaking in the solar sy
Externí odkaz:
https://doaj.org/article/e5a90356fb0348ea8e0fd54a89564e61
Autor:
Ashok K. Singal
Publikováno v:
Symmetry, Vol 12, Iss 11, p 1833 (2020)
We examine here the discrepancy between the radiated power, calculated from the Poynting flux at infinity, and the power loss due to radiation reaction for an accelerated charge. It is emphasized that one needs to maintain a clear distinction between
Externí odkaz:
https://doaj.org/article/5eb23e7a408e45d08dfba24ad2b0c507
Autor:
Ashok K. Singal
Publikováno v:
American Journal of Physics. 88:551-557
We analyze here the changes that may occur in the length of a rod due to Lorentz contraction, when the rod, initially stationary in one inertial frame, is accelerated so as to come to rest in another inertial frame. The rod that earlier appeared shor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9262db4060dbf952758e86980d372d19
https://doi.org/10.1119/10.0000964
https://doi.org/10.1119/10.0000964
Autor:
Ashok K. Singal
In moving electromagnetic systems, electromagnetic momentum calculated from the vector potential is shown to be proportional to the field energy of the system. The momentum thus obtained is shown actually to be the same as derived from a Lorentz tran
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::87ca3c8d7d9e95e75dafb05093714f76
Autor:
Ashok k. Singal
Using the principle of equivalence, it has recently been shown that the electrostatic field lines of a charge, stationary in the gravitational field, bend exactly like the trajectories of photons emitted isotropically from a source at the charge loca
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c4975749109678d796b63968503f6360
Autor:
Ashok K. Singal
Publikováno v:
Monthly Notices of the Royal Astronomical Society: Letters. 488:L104-L108
An observer stationary with respect to comoving coordinates of the expanding universe should find the redshift distribution to be isotropic. However, a peculiar motion of the observer would introduce a dipole anisotropy in the observed redshift distr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8423b9a0fe4bf89664d076b7fc512572
https://doi.org/10.1093/mnrasl/slz107
https://doi.org/10.1093/mnrasl/slz107
Autor:
Ashok K. Singal
Publikováno v:
Foundations of Physics. 51
We study in detail the electromagnetic fields and the Poynting flux in the case of a uniformly accelerated charge, in order to examine whether such a charge does `emit' radiation, especially in view of the widely accepted fact that there is no radiat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dd974074146b7ec514a3205a07cb08af
https://doi.org/10.1007/s10701-021-00486-1
https://doi.org/10.1007/s10701-021-00486-1
Autor:
Ashok K. Singal
Publikováno v:
Physical Sciences Forum
Volume 2
Issue 1
Volume 2
Issue 1
According to the Cosmological Principle, the Universe should appear isotropic, without any preferred directions, to a comoving observer. However, a peculiar motion of the observer, or equivalently of the solar system, might introduce a dipole anisotr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c65c8a080733f0ddfe60f94c5dec248d
https://doi.org/10.3390/ecu2021-09270
https://doi.org/10.3390/ecu2021-09270
Autor:
Ashok K. Singal
In the energy-momentum density expressions for a relativistic perfect fluid with a bulk motion, one comes across a couple of pressure-dependent terms, which though well known, are to an extent, lacking in their conceptual basis and the ensuing physic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fc92c7bbc6a3ef82e3907151108dde58
https://doi.org/10.20944/preprints202010.0205.v2
https://doi.org/10.20944/preprints202010.0205.v2