Pub Date : 2023-09-01DOI: 10.13189/ujpa.2023.170301
Akram Louiz
{"title":"The Disk of Concave Mirrors: An Experiment of the Light with Contradictory Formulas","authors":"Akram Louiz","doi":"10.13189/ujpa.2023.170301","DOIUrl":"https://doi.org/10.13189/ujpa.2023.170301","url":null,"abstract":"","PeriodicalId":23443,"journal":{"name":"Universal Journal of Physics and Application","volume":"54 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89938939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-01DOI: 10.13189/ujpa.2023.170201
R. Longo
{"title":"The NOW of time and the Pioneer Anomaly","authors":"R. Longo","doi":"10.13189/ujpa.2023.170201","DOIUrl":"https://doi.org/10.13189/ujpa.2023.170201","url":null,"abstract":"","PeriodicalId":23443,"journal":{"name":"Universal Journal of Physics and Application","volume":" 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91411563","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-01DOI: 10.13189/ujpa.2023.170101
G. Harnagel
{"title":"Tachyons, the Four-Momentum Formalism and Simultaneity","authors":"G. Harnagel","doi":"10.13189/ujpa.2023.170101","DOIUrl":"https://doi.org/10.13189/ujpa.2023.170101","url":null,"abstract":"","PeriodicalId":23443,"journal":{"name":"Universal Journal of Physics and Application","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74089668","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-01DOI: 10.13189/ujpa.2023.170102
Omprakash Atale
{"title":"Killing Vector Fields and Conserved Currents on Rotationally Symmetric Space-time","authors":"Omprakash Atale","doi":"10.13189/ujpa.2023.170102","DOIUrl":"https://doi.org/10.13189/ujpa.2023.170102","url":null,"abstract":"","PeriodicalId":23443,"journal":{"name":"Universal Journal of Physics and Application","volume":"27 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83258275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-09-01DOI: 10.13189/ujpa.2022.160301
P. Bhattacharjee
{"title":"Discovery of Ambiguity in the Traditional Norms of Specifying Physical Quantities along the Axes of Coordinates in Drawing Data Based Graphs","authors":"P. Bhattacharjee","doi":"10.13189/ujpa.2022.160301","DOIUrl":"https://doi.org/10.13189/ujpa.2022.160301","url":null,"abstract":"","PeriodicalId":23443,"journal":{"name":"Universal Journal of Physics and Application","volume":"66 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83444620","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-08-01DOI: 10.13189/ujpa.2022.160202
R. Longo
{"title":"Theories Affected by Time Flow","authors":"R. Longo","doi":"10.13189/ujpa.2022.160202","DOIUrl":"https://doi.org/10.13189/ujpa.2022.160202","url":null,"abstract":"","PeriodicalId":23443,"journal":{"name":"Universal Journal of Physics and Application","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75895470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-08-01DOI: 10.13189/ujpa.2022.160201
L. Ferreira
{"title":"Relativistic Polygonal and Circular Paths: Solution for the Twins' Paradox Reviewed and Extended","authors":"L. Ferreira","doi":"10.13189/ujpa.2022.160201","DOIUrl":"https://doi.org/10.13189/ujpa.2022.160201","url":null,"abstract":"","PeriodicalId":23443,"journal":{"name":"Universal Journal of Physics and Application","volume":"45 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88207775","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-01DOI: 10.13189/ujpa.2022.160101
R. Longo
{"title":"The NOW of Time and How It Impacts Physics","authors":"R. Longo","doi":"10.13189/ujpa.2022.160101","DOIUrl":"https://doi.org/10.13189/ujpa.2022.160101","url":null,"abstract":"","PeriodicalId":23443,"journal":{"name":"Universal Journal of Physics and Application","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73057947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-21DOI: 10.13189/ujpa.2022.160401
Oyvind Gron, Eirik Berntsen
A new apparent relativistic paradox is presented involving only one space-time event. This is different from earlier relativistic paradoxes involving extended bodies or events at different positions. A collision between a rod and a ring impacting at an oblique angle to each other is considered in the context of the special theory relativity. A question arises as to where along the length of the rod the point of impact will be according to two observers following the rod and the ring, respectively. The observers argue from a purely kinematical point of view in favor of two different points of impact along the rod. However there can only exist one point of impact. In order to solve this apparent paradox we use the asynchronous formulation of relativistic kinematics in which the consequences of the relativity of simultaneity are built into the formalism. We show that this reconciles the descriptions from the two frames of reference, and hence that the new paradox leads to a strong argument for the relevance of the asynchronous formulation of relativistic kinematics.
{"title":"Rod-ring Paradox","authors":"Oyvind Gron, Eirik Berntsen","doi":"10.13189/ujpa.2022.160401","DOIUrl":"https://doi.org/10.13189/ujpa.2022.160401","url":null,"abstract":"A new apparent relativistic paradox is presented involving only one space-time event. This is different from earlier relativistic paradoxes involving extended bodies or events at different positions. A collision between a rod and a ring impacting at an oblique angle to each other is considered in the context of the special theory relativity. A question arises as to where along the length of the rod the point of impact will be according to two observers following the rod and the ring, respectively. The observers argue from a purely kinematical point of view in favor of two different points of impact along the rod. However there can only exist one point of impact. In order to solve this apparent paradox we use the asynchronous formulation of relativistic kinematics in which the consequences of the relativity of simultaneity are built into the formalism. We show that this reconciles the descriptions from the two frames of reference, and hence that the new paradox leads to a strong argument for the relevance of the asynchronous formulation of relativistic kinematics.","PeriodicalId":23443,"journal":{"name":"Universal Journal of Physics and Application","volume":"38 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85746671","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-01DOI: 10.13189/ujpa.2021.150101
L. Ferreira
The so-called “twin’s paradox” is considered an important issue in special relativity theory because it implies a profound understanding of space time structure. And yet, since its original formulation in 1911 by Paul Langevin, numerous alleged explanations for this disturbing paradox have been produced; as it seems, unsuccessfully. This remains a subject for heated debate. Why? Because in all those explanations one tries to reconcile the irreconcilable, this is, what seems to be a logical conclusion (based on the phenomenon of time dilation) with what is simply unacceptable: how can it be a difference in aging from twins without breaking the fundamental equivalency between frames of coordinates? The purpose of this research is, first, to point out the basic flaws in the premises of the usual “explanations” and then to provide a consistent answer to the problem. It is proven here that there is no twin’s paradox and this despite the reality of time dilation. Proceeding without prejudice, simply following appropriate premises and mathematical equations, one finally discovers an astoundingly, wonderfully coherent resolution to the problem, and this in the frame of special relativity itself. The key to understand and finally resolve this puzzling issue is relativistic asynchrony, particularly past and future permutation. Finally, the implications of this understanding, as can be easily induced, go far beyond special relativity. If there is no different aging in inertial frames, regardless of their relative velocity, should this conclusion also apply to accelerated ones, this is, to general relativity?
{"title":"Criticism to the Twin's Paradox","authors":"L. Ferreira","doi":"10.13189/ujpa.2021.150101","DOIUrl":"https://doi.org/10.13189/ujpa.2021.150101","url":null,"abstract":"The so-called “twin’s paradox” is considered an important issue in special relativity theory because it implies a profound understanding of space time structure. And yet, since its original formulation in 1911 by Paul Langevin, numerous alleged explanations for this disturbing paradox have been produced; as it seems, unsuccessfully. This remains a subject for heated debate. Why? Because in all those explanations one tries to reconcile the irreconcilable, this is, what seems to be a logical conclusion (based on the phenomenon of time dilation) with what is simply unacceptable: how can it be a difference in aging from twins without breaking the fundamental equivalency between frames of coordinates? The purpose of this research is, first, to point out the basic flaws in the premises of the usual “explanations” and then to provide a consistent answer to the problem. It is proven here that there is no twin’s paradox and this despite the reality of time dilation. Proceeding without prejudice, simply following appropriate premises and mathematical equations, one finally discovers an astoundingly, wonderfully coherent resolution to the problem, and this in the frame of special relativity itself. The key to understand and finally resolve this puzzling issue is relativistic asynchrony, particularly past and future permutation. Finally, the implications of this understanding, as can be easily induced, go far beyond special relativity. If there is no different aging in inertial frames, regardless of their relative velocity, should this conclusion also apply to accelerated ones, this is, to general relativity?","PeriodicalId":23443,"journal":{"name":"Universal Journal of Physics and Application","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82978150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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