Example:
15 PHz = 5.003461e+25 wavelength in exametres
1 PHz = 3.335641e+24 wavelength in exametres | 1 wavelength in exametres = 2.997925e-25 PHz
Conversion Steps:
15 × (1e+15 / 2.997925e-10) = 5.003461e+25