Chemistry · Structure of atom

In a vacuum, all types of electromagnetic radiations travel at the same speed, \( c \), which is equal to:

1. \( 3.00 \times 10^8 \text{ m s}^{-1} \)
2. \( 3.00 \times 10^{10} \text{ m s}^{-1} \)
3. \( 3.00 \times 10^6 \text{ m s}^{-1} \)
4. \( 2.998 \times 10^6 \text{ m s}^{-1} \)