Since it is a laser we can assume that the speed is equal to the speed of light, therefore, its speed is given by:
[tex]v=c=3\times10^8m/s[/tex]Now, using the following equation:
[tex]\begin{gathered} v=\lambda f \\ so: \\ f=\frac{v}{\lambda} \\ where: \\ v=3\times10^8m/s \\ \lambda=632.8\times10^{-9}m \\ so: \\ f=\frac{3\times10^8m/s}{632.8\times10^{-9}m} \\ f\approx4.74\times10^{14}Hz \end{gathered}[/tex]Answer:
4.74x10¹⁴ Hz
