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The frequency is f =c/w= 300E6/600E-10 =.5E16 = 5 Petahertz.
An X-ray has a frequency in the range 30 petahertz to 30 exahertz, that is 30×1015 Hz to 30×1018 Hz.
Frequencies in the range 30 PHz (PetaHertz) to 750 THz (TeraHertz), Wavelengths from 10 nm to 400 nm.
An X-ray has a wavelength in the range of 10 to 0.01 nanometers.
The frequency is in the range of 30 petahertz to 30 exahertz, that is 30×10^15 Hz to 30×10^18 Hz.