Question

why it is E=mc2 ??????¿???????????????????????????????​

Answer 1

Answer:

Although we say E = mc^2, Einstein first wrote it this other way, assigning an energy-equivalent-mass to massless particles...... Conserving energy and momentum both seems to be something our Universe requires, and that's why E = mc^2.

Answer 2

Answer:

e= energy m= mass c²= energy of light squared

Explanation:

means energy = mass*energy of light squared