Light Color, Frequency and Wavelength Illustration

Beginning work on an illustration covering the relationship between the frequency^* and wavelength^* of electromagnetic energy. Below is an experiment in visualizing this relationship for visible light^*. Wavelengths from blue (462 nm) to red (655 nm) are covered. Moving the slider changes the frequency and wavelength of the light. Color adjusts as the slider moves. The color shown is an approximation.

The relationship illustrated is: Speed of light = wavelength × frequency where:

• The speed of light is 2.98 × 10⁸m/s.
• Frequency is shown in terahertz (THz). A terahertz is 10¹² cycles per second.
• Wavelength is shown in namometers (nm). A nanometer is a billionth of a meter.

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