#:Finally, as noted above, the "c" in the equation is commonly called the "speed of light", but it is really just the calibration factor. The equation is not about light. Just mass and energy. The equation is true in the dark. | #:Finally, as noted above, the "c" in the equation is commonly called the "speed of light", but it is really just the calibration factor. The equation is not about light. Just mass and energy. The equation is true in the dark. |