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Color Vision

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PhET Interactive Simulations
University of Colorado Boulder


  • Photons
  • Monochromatic Light
  • White Light
  • Rainbows


Make a whole rainbow by mixing red, green, and blue light. Change the wavelength of a monochromatic beam or filter white light. View the light as a solid beam, or see the individual photons.

Sample Learning Goals

  • Determine what color the person sees for various combinations of red, green, and blue light.
  • Describe the color of light that is able to pass through different colored filters.
Version 1.1.11