The relativistic energy-momentum relation is a cornerstone of modern physics, linking the total energy (E) of a particle to its rest mass (m₀) and relativistic momentum (P). Also, Einstein's special theory of relativity 1-4 revolutionized our understanding of space, time, and the fundamental relationship between mass and energy. For better understanding, the author of this article presents a thorough and algebraically sound novel derivation for Paul Dirac’s energy-momentum equation.
Chinnaraji Annamalai (2025) studied this question.