Oh - I see now. The equation for energy is just a conversion equation, so the way I arranged it in the latter doesn't actually mean anything.
And then so the equation that I was windering about was the one that all speeds or frames of reference would agree on the object as having the same...
I know that any time energy is generated, you can use the equation in the form of E = mc^2.
Also, that energy becoming matter can be described as m = E/(c^2).
But, going as those are, is it also assumable that you could say c^2 = m/E? In other words, would the speed of light in a perfect...