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## Main Question or Discussion Point

i know its a stupid question but im a beginner:

according to eisntein:

[tex]E=K+m_{o}c^2[/tex]

but the plane wave solution yields that particle's KE is its total energy,where free particle has no potential energy. But where is the rest mass energy[tex]m_{o}c^2[/tex]? Is it omitted?

according to eisntein:

[tex]E=K+m_{o}c^2[/tex]

but the plane wave solution yields that particle's KE is its total energy,where free particle has no potential energy. But where is the rest mass energy[tex]m_{o}c^2[/tex]? Is it omitted?