Author:
Mazzini, Jose Oreste
Category:
Research Papers
Sub-Category:
Relativity Theory
Date Published:
October 31, 2025
Keywords:
mass at rest, observed mass, proper mass, mass invariance, energy invariance, Lorentz transformation
Abstract:
This paper re-examines the invariance of energy and mass under Lorentz transformations by distinguishing between boosts — active transformations involving actual energy changes — and passive transformations, such as translations or rotations, which involve no physical energy ex- change. Building on the author’s previous work, which demonstrated that rest mass remains invariant under active boosts, this study shows that the spacetime interval ds is not invariant in active boosts. In contrast, for passive transformations, ds remains invariant, implying the invariance of proper time and relativistic mass. Additionally, the paper reinterprets electromagnetic waves as entities with non-zero ds corresponding to the wavelength λ = cτ , where τ is the proper time periodicity of energy. Furthermore, the relativistic Lagrangian is redefined, as well, restricting Minkowski’s metric to passive transformations. This interpretation supports the Theory of Space, where the fourth dimension cτ represents energy’s intrinsic wavelength, independent of the observer. Several implications for classical electrodynamics, relativity, quantum mechanics, field theory, and thermodynamics are discussed, suggesting that energy invariance under non-boosted conditions provides a unified four-dimensional (3+1) geometric foundation for modern physics.
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