Question

what is instine theory demonstrate Mass=Energy

Answer 1

he gave the eqn defining
energy(E)=mass(M)×speed of light square (c square)

Answer 2

hope it helpFormulated by Albert Einstein in 1905, the theory of relativity is the notion that the laws of physics are the same everywhere. ... In fact, there are several instances of relativity that we can see in our daily lives, and even technologies we use today that demonstrate that Einstein was right.M