when theory of relativity declares speed of light to be the limit for speeds of all matter and energy and information. then, how can einstein in his mass-energy eqn talk about c squared. we can't talk about any velocity more than c.(adsbygoogle = window.adsbygoogle || []).push({});

it is possible that e = mck where the value of constant k shall be equal to value(only of magnitude only) of c.

also ,

h.nu is directly proportional to mc, and ratio of h.nu to mc is the constant with value equalling c.

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# On E=mc2

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