Electromagnetic Spectrum Reference
Explore the electromagnetic spectrum: radio waves to gamma rays with frequency and wavelength ranges.
| Band | Frequency | Wavelength | Uses |
|---|---|---|---|
| Radio | < 300 MHz | > 1 m | Broadcasting, AM/FM |
| Microwave | 300 MHz – 300 GHz | 1 mm – 1 m | WiFi, radar, cooking |
| Infrared | 300 GHz – 430 THz | 700 nm – 1 mm | Heat, remote controls |
| Visible | 430 – 790 THz | 380 – 700 nm | Human vision |
| Ultraviolet | 790 THz – 30 PHz | 10 – 380 nm | Sterilisation, sunburn |
| X-ray | 30 PHz – 30 EHz | 0.01 – 10 nm | Medical imaging |
| Gamma Ray | > 30 EHz | < 0.01 nm | Nuclear, cancer therapy |
How It Works
Enter a frequency or wavelength to identify where it falls in the electromagnetic spectrum. The table below shows all major EM bands with their frequency and wavelength ranges.
Formula
c = f × λ | c ≈ 3 × 10⁸ m/s
Frequently Asked Questions
What is the electromagnetic spectrum?
The EM spectrum encompasses all types of electromagnetic radiation ordered by frequency and wavelength, from low-frequency radio waves to high-frequency gamma rays.
What type of EM radiation is visible light?
Visible light occupies roughly 380–700 nm wavelength (430–790 THz). Violet is the highest frequency and red the lowest in the visible range.