Example:
15 THz = 5.003461e+22 wavelength in exametres
1 THz = 3.335641e+21 wavelength in exametres | 1 wavelength in exametres = 2.997925e-22 THz
Conversion Steps:
15 × (1e+12 / 2.997925e-10) = 5.003461e+22