# How is scientific notation used in physics?

For example, one light year in standard notation is $9 460 000 000 000 000 \text{m}$, but in scientific notation, it is $9.46 \times {10}^{15} \text{m}$.
The mass of an electron is $9.109 \times {10}^{- 31} \text{kg}$ in scientific notation, but in standard form it is $0.000 000 000 000 000 000 000 000 000 000 9109 \text{kg}$.