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"Kids science: Light Spectrum." Ducksters. Technological Solutions, Inc. (TSI), Apr. 2013. Web. 20 Apr. 2013. <http://www.ducksters.com/science/light_spectrum.php>.
What is the visible spectrum or visible light waves?
The visible spectrum is basically the portion of the electromagnetic spectrum that our eyes can see – visible light. Remember, not all light forms are visible to human eye.
We see these light waves as the colours of the rainbow. Each colour has a different wavelength. Red has the longest wavelength and violet has the shortest wavelength. When all the waves are seen together, they make white light.