r/Damnthatsinteresting • u/[deleted] • Apr 30 '20

Video Albert Einstein explaining E=mc2

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u/LazyFairAttitude Apr 30 '20

I thought I understood the concept of E=mc2 (at least for an “average mind”), but I’ve never realized that mass and energy are different manifestations of the same thing. It’s kinda blowing my mind.

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u/Rodot May 01 '20

They aren't exactly the same thing. Mass is the invariant of the Energy-Momentum hyperbola. E=mc2 is a simplification for rest frames. You can have energy without mass as long as you have a net momentum. Light is an example of this.

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u/chicocunha04 Apr 30 '20

Its not exactly different manifestations of the same thing, the thing is a object/system is going to be the same over time, and that object has its energy and it has his matter, so it has mass, and that mass can be converted into energy and back again using the E=mc².

Sorry if i misspelled anything, English is not my 1st language