Length Contraction, Time Dilation, Constancy of the Speed of Light: What Should Be First?

1993 ◽  
Vol 6 (3) ◽  
pp. 374-379
Author(s):  
James D. Edmonds
Keyword(s):  
Time Dilation ◽  
Contraction Time ◽  
Speed Of Light ◽  
Length Contraction

Energy and Momentum

2018 ◽  
Author(s):  
David M. Wittman
Keyword(s):  
Time Dilation ◽  
Speed Of Light ◽  
Massless Particles ◽  
The Everyday ◽  
Low Speeds ◽  
Energy And Momentum ◽  
Deep Relationship ◽  
Insight Into ◽  
Momentum Relation

Tis chapter explains the famous equation E = mc2 as part of a wider relationship between energy, mass, and momentum. We start by defning energy and momentum in the everyday sense. We then build on the stretching‐triangle picture of spacetime vectors developed in Chapter 11 to see how energy, mass, and momentum have a deep relationship that is not obvious at everyday low speeds. When momentum is zero (a mass is at rest) this energy‐momentum relation simplifes to E = mc2, which implies that mass at rest quietly stores tremendous amounts of energy. Te energymomentum relation also implies that traveling near the speed of light (e.g., to take advantage of time dilation for interstellar journeys) will require tremendous amounts of energy. Finally, we look at the simplifed form of the energy‐momentum relation when the mass is zero. Tis gives us insight into the behavior of massless particles such as the photon.

scholarly journals Dilation of Time Dilation

2017 ◽  
Vol 9 (6) ◽  
pp. 67
Author(s):  
Tadeusz Wajda
Keyword(s):  
Light Pulse ◽  
Michelson Interferometer ◽  
Time Dilation ◽  
Constant Time ◽  
Theory Of Relativity ◽  
Speed Of Light ◽  
Time Intervals ◽  
Interference Fringes ◽  
Fundamental Error ◽  
Transportation Speed

The study addresses the issue of the so-called time dilation in the sense of the origin of its creation and the physical existence.Based on the work of Lorentz, who the lack of displacement of interference fringes in the Michelson interferometer explained wrongly with, shortening one arm of the interferometer, I propose the construction of the light pulse clock, in which to measure the rate of the passage of time is used constancy speed of light in vacuum.Light clock, the construction of which is described in the paper, stationary in relation to the ether, will measure constant time intervals. The same clock transported, will slow down the pace of his walk as a function of transportation speed v and that is a novelty, will slow depending on its orientation relative to the direction of motion. Light clock transported transversely with respect to the stationary clock will slow gamma times, transported lengthwise will slow gamma to the second power.Basing on the obtained dependences I maintain that time dilation defined in the theory of relativity (SR) as the slowing of the lapse of time, does not physically exist and identification the varying pace of walk clock with the pace of lapse of time I consider a fundamental error resulting from the postulates of this theory.

scholarly journals Geometrical formulation of relativistic mechanics

2018 ◽  
Vol 15 (04) ◽  
pp. 1850062 ◽  
Author(s):  
Sumanto Chanda ◽  
Partha Guha
Keyword(s):  
Lorentz Transformation ◽  
Ad Hoc ◽  
Lagrange Equation ◽  
Equations Of Motion ◽  
Time Dilation ◽  
Gravitational Redshift ◽  
Hamiltonian Mechanics ◽  
Local Lorentz Transformation ◽  
Length Contraction ◽  
Geometrical Formulation

The relativistic Lagrangian in presence of potentials was formulated directly from the metric, with the classical Lagrangian shown embedded within it. Using it we formulated covariant equations of motion, a deformed Euler–Lagrange equation, and relativistic Hamiltonian mechanics. We also formulate a modified local Lorentz transformation, such that the metric at a point is invariant only under the transformation defined at that point, and derive the formulae for time-dilation, length contraction, and gravitational redshift. Then we compare our formulation under non-relativistic approximations to the conventional ad hoc formulation, and we briefly analyze the relativistic Liénard oscillator and the spacetime it implies.

scholarly journals Relativity Tied to Repulsion Gravity

2021 ◽  
pp. 1-3
Author(s):  
Joseph E Brierly ◽  
Keyword(s):  
Special Theory ◽  
Time Dilation ◽  
Theory Of Relativity ◽  
General Theory Of Relativity ◽  
Special Theory Of Relativity ◽  
Attraction Force ◽  
Dilation Equation ◽  
Length Contraction ◽  
Incompleteness Theorems ◽  
Simple Equations

This article refutes the Time Dilation Equation and Length Contraction that are derived in the Special Theory of Relativity. The conclusion reached in this article is that Time Dilation and Length Contraction cannot be characterized by simple equations due to repulsion gravity. The conclusion follows from gravity being a natural force of repulsion rather than the assumption that gravity is an attraction force. That gravity is a repulsion force follows from the Sir Arthur Eddington experiment designed to prove that gravity affects light. Few looked at that experiment as anything other than proving Einstein’s General Theory of Relativity that suggested gravity would affect light. The experiment went beyond what most imagined it accomplished. It surely verified that gravity affects light. But it did more than that. The experiment showed that gravity is a force of repulsion and not attraction as most believed. That gravity is repulsion and not an attraction force indicates that the relativity time dilation equation derived in the Special Theory of Relativity is intractably undecidable likely subject to Godels Incompleteness theorems

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