Overview of spectral regions with corresponding energy transitions, wavelengths, energies, and wavenumbers.
Spectrum Classification | Energy Transitions | Wavelength Range (nm) | Wavenumber (cm |
Energy (eV) |
X-rays | Bond breaking | 0.01–10 | 124 – 124 × |
|
Ultraviolet | Electronic | 200–400 | 25,000–50,000 | 3.10–6.20 |
Visible | 400–800 | 12,500–25,000 | 1.55–3.10 | |
Infrared | Vibrational | 2,500–25,000 | 400–4,000 | 0.05–0.5 |
Microwave | Rotational | 0.01–10 | 1.24 × |
|
Radio frequencies | Electronic spin | 1–10 | 1.24 × |
|
Nuclear spin | 1.24 × |