Question

Derivation of physics formula (e=mc²)????
Plz send me the derivation

Answer 1

according to Albert Einstein in 1905 energy itself has a mass ,if an object gains energy it's mass increases, if it loses energy it's mass decreases .the mass change which is m kg is linked to the energy change by this equation, where c is the speed of light which is 3*10^8 m/s