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So, energy equals mass times the speed of light squared.

Energy can determine speed, because the energy is transferred into the 3 spacial dimensions.

My question is with E=MC^2 itself, Energy of light would equal zero mass times the speed of light squared, right? But that would mean light had zero energy. Care to help explain? I really wanna figure this out, and I'm reading the Elegant Universe right now so it would help to understand this before going in too much further.

Thanks,

-Lazer

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# E=MC^2 question about the M

**Physics Forums | Science Articles, Homework Help, Discussion**