Is e=mck Compatible with Einstein's Theory of Relativity?

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The discussion centers on the compatibility of the equation e = mck with Einstein's Theory of Relativity. Participants argue that while the speed of light (c) is a limit for matter and energy, it can still be treated as a numerical constant in equations. The relationship h.nu is noted to be directly proportional to mc, with the ratio of h.nu to mc equating to c. Clarifications are made that c and c² represent numerical values with specific units, rather than velocities, emphasizing the importance of understanding these distinctions in physics.

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GautamAishwarya
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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.
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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Don't confuse arithmetic with physics. c is a number (with units). It happens to be the speed of light but it is just a number. c2 is another number that is NOT the speed of light. In fact, since c2 has units of length2/time2, it cannot be the speed of anything. If you want to say "the value of constant k shall be equal to value(only of magnitude only) of c", fine (well, not "magnitude only" because you have to take the units into account), but that was what was meant all along.
 

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