Given data
*The given speed of an electromagnetic wave is
[tex]c=3\times10^8\text{ m/s}[/tex]*The given wavelength of the wave is
[tex]\lambda=0.6\text{ m}[/tex]The formula for the frequency of the wave is given as
[tex]\begin{gathered} \lambda=\frac{c}{f} \\ f=\frac{c}{\lambda} \end{gathered}[/tex]Substitute the values in the above expression as
[tex]\begin{gathered} f=\frac{3.0\times10^8}{0.6} \\ =5\times10^8\text{ Hz} \end{gathered}[/tex]