The correct answer to this question is Albert Einstein. He is a physicist, who coined the term. This is a formula, which correlates energy to mass. When he originally wrote the question, he wrote it as m=L/c2. The L represented Lagrangian, which is a general form of energy.

Each letter in the equation represents something. The E represents energy and it is measured in Joules. This measurement is measured as kg x m2/s2, which stands for kilograms times meters squared per seconds squared. M stands for the mass of an object. Lastly, C is a representation of the speed of light.