Why is mass multiplied by the speed of light squared in Einstein's equation?
The easiest way to explain this is to look at this equation: 2+x=4. The only way to make the equation correct is to express it in such as way that it is balanced.
June 26, 2017 10:37PM
The speed of light, c is constant in all reference frames and is roughly equal to 3.00x108 meters per second. In the context of Einstein's relativity, the c2 functions more as a unit conversion factor than a constant. As such, it is squared as a result of dimensional analysis - energy is measured in joules, or kg m2 s-2, so adding the c2 ensures that the relationship between energy and mass is dimensionally consistent. ~ WikiHow.