IR Spectrum Basics and Infrared Communication Frequencies

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This page covers the basics of the Infrared (IR) spectrum and provides an IR spectrum table listing frequencies used for Infrared Communication.

As the name suggests, “infrared” combines “infra” and “red.” It refers to light with a lower frequency or longer wavelength than red light.

Figure 1 shows the light spectrum, highlighting the IR spectrum space.

light infrared-IR spectrum

Infrared radiation is invisible electromagnetic energy. Its frequency range extends from 430 THz to 300 GHz. The IR spectrum is further subdivided into near-infrared (120THz-400THz), mid-infrared (30THz-120THz), and far-infrared (300GHz-30THz) bands.

Infrared-IR Spectrum Table

The following table details the wavelengths of common colors and the IR spectrum. LEDs and laser detectors are commonly used in IR-based products. The IR wavelength range is from 700 nm to 1 mm.

ColorWavelength (nm)
Violet400
Blue470
Green565
Yellow590
Orange630
Red780
Near Infrared800 to 1000
Infrared1000 to 2000
Far Infrared2000 to 10000
Frequency to Wavelength Converter

Frequency to Wavelength Converter

Convert between frequency and wavelength using this handy online tool. Calculate frequency from wavelength, or wavelength from frequency, quickly and easily.

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RF Wavelength Calculator and Formula

RF Wavelength Calculator and Formula

Calculate the wavelength of a radio frequency (RF) signal using this online calculator. The formula and example are provided for easy understanding.

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