or up) regions. Wavelength (nm) Spectral Range Frequency (Hz) Energy (eV) X-ray Soft X-ray 10 10 2 1016 Extreme UV region 2 10 10 Vacuum UV region 200 Ultraviolet region 1015 350 Visible region 3 750 10 Near infrared region 1 1014 4 Infrared region 10 10-1 1013 5 10 10-2 12 Far infrared region 10 10 6