I know E=mc(adsbygoogle = window.adsbygoogle || []).push({}); ^{2}essentially means energy = mass. One might think why not just say E = m?

But I also know that: Every object travels through space and time at the speed of light.

So now one might think why not just E=mc? That's essentially where I'm stuck at now. I'm not sure why it's necessary to^{2}the c.

I know that light waves only travel at right angles, but I don't know if that has any relevance to the formula.

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# Why Not Just E=mc?

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