Change the wavelength and see which band you are in, the frequency, the photon energy and where that radiation is used.
Last updated: 26 October 2026
Order by decreasing wavelength: radio, microwave, infrared, visible (about 400–700 nm), ultraviolet, X-rays, gamma rays. Photon energy in eV is about 1240 ÷ wavelength in nm.
| Band | Typical wavelength | Used for |
|---|---|---|
| Gamma rays | < 10⁻¹¹ m | Cancer therapy, nuclear reactions |
| X-rays | 10⁻¹¹ – 10⁻⁸ m | Medical imaging |
| Ultraviolet | 10⁻⁸ – 4 × 10⁻⁷ m | Sterilisation |
| Visible | 400 – 700 nm | Vision |
| Infrared | 700 nm – 1 mm | Heat, remote controls |
| Microwaves | 1 mm – 10 cm | Radar, ovens, mobile networks |
| Radio | > 10 cm | Broadcasting |
By decreasing wavelength: radio, microwave, infrared, visible, ultraviolet, X-rays, gamma rays.
E = hc/λ. With λ in nm, E (in eV) ≈ 1240/λ.
No. They travel through vacuum at c = 3 × 10⁸ m/s.
