Question

Which of the following relation is dimensionally incorrect

Answer 1

Answer:

As, we know, E=mc

2

and energy released can be given as:

E=931MeV

for, m=1u

1u=931.5MeV/c

2

- Dimensionally correct [Dimension of mass]

1u=1.67×10

−27

kg - Dimensionally correct [Dimension of mass]

but, 931.5 MeV is having the dimension of energy so it can't be equated to dimension of mass or dimension of 1u.