how do you develop e=mc2 from ab initio first principle?

Answer 1

Since Einstein published a paper in1946 in which he developed this now well-known relationship, several alternative proofs have been advanced. Perhaps the simplest is based upon the Doppler effect. Here we consider a particle moving within a large container and emitting a pulse of radiation. The light pulse in the direction of motion will suffer increased frequency, whilst the light pulse in the reverse direction will experience decreased frequency. By evaluating the net forward momentum, the equation e = mc^2 can be derived. Please forgive the lack of final detail - this is not the most suitable place to elaborate!

Answer 2

The equations of Energy were first developped by Rene Cartes and Liebniz. The first equation said that energy is equal to the product of mass and the final velocity square that the mass travels. Later On ,Henri Poincare formulated and published the formula E=MC^2 in 1900. Einstein used this formula in his theory of Special RElativity iin 1905.
The equation can be derived from Maxwell's equations.
Energy can be Expressed as E= M * 1/ (e sub o * mu sub o)
Where M is the Quantity of mass in the structure ,e sub o is the permitivity of the Space, and mu sub o is the permeability of space.