Wavelength=c/v, where c is the speed of light, v is the frequency
v=c/w=299,792,458/6.35 X 10^9
v=4.72 X 10^-2 Hertz.
However, you don't state the units of the wavelength, i.e., is it in meters, centimeters, kilometers.....etc. I assumed meters in my calculation.
