Question

Define Dimension.

Answer 1

Dimension : In order to obtain the unit of a physical quantity, the fundamental units are raised by powers, which represents its dimension.

For example — if we write, $[ Y ]=\left[ M ^{a} L ^{b} T ^{c}\right]$ then $a, b$ and $c$ are respectively dimension of $Y$ in $M, L$ and in $T$.