Question

Can you tell me the derivation of E=mc^2?
In simplest way.
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Answer 1

Answer:

${\bf{\green{=>E^2=P^2C^2+M^2C^4}}}$

${\bf{\red{=>E^2=C^2(P^2+m^2c^2)}}}$

${\bf{\blue{=>E=sqrtc^2(p^2+m^2c^2)}}}$

${\bf{\pink{when }}}$${\bf{\green{matter }}}$${\bf{\orange{is}}}$${\bf{\blue{at}}}$${\bf{\red{rest}}}$${\bf{\green{p}}}$${\bf{\pink{=}}}$${\bf{\blue{0}}}$

${\bf{\red{E=sqrtm^2c^4}}}$

${\bf{\blue{E=mc^2}}}$