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A famous relation in phyics relates the moving mass m to the rest mass m0 of a particle in terms of its speed v and the speed of light c.( This relation first arose as a consequence of the special theory of relativity due to Albert Einstein). A body recalls the relation almost correctly but forgets where to put the constant c . He writes m=m0(1V2)1/2. Guess where to put the missing c.

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From the given equation, m0m=1v2
Left hand side is dimensionless.
Therefore, right hand side should also be dimensionless.
It is possible only when 1v2 should be 1v2c2.
Thus, the correct formula is m=m0(1v2c2)1/2

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Updated on:21/07/2023

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