What is the wavelength in nanometers of a photon of light that has a frequency on 1.5 x 10^15 hz

Equation:

Ф = v / f where Ф is wavelength, v is velocity of wave (which is usually the speed of light 300,000 km per second, and f is frequency.

Ф = (300,000) / 1.5x10^15

We have been looking at the wave properties of electromagnetic radiation ... the wavelength and frequency of photons with the following energies: E photon = 1200 eV (x-ray) 1.0 nm3.0x10-17 Hz; Ephoton=4.2x10-19 J (blue ... MeV / c2) 8.2 x10-14 J 0.51 MeV; Proton (1.67x10-27 kg) 1.5x10 - 10 J 0.94