Electromagnetic spectrum order (increasing frequency) (Radio → Microwave → Infrared → Visible → UV → X-ray →)
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Radio → Microwave → Infrared → Visible → UV → X-ray → Gamma (ν ↑)
What each symbol means
| Symbol | What it stands for |
|---|---|
| λ | Wavelength in vacuum: c = νλ |
| ν | Frequency (Hz) |
When to use this
Standard ordering by increasing frequency (decreasing wavelength in vacuum). Sub-bands exist within each region.