Color

• http://violet.pha.jhu.edu/~wpb/spectroscopy/basics.html

Speed of light

• http://math.ucr.edu/home/baez/physics/Relativity/SpeedOfLight/speed_of_light.html
• http://www.fas.harvard.edu/~scdiroff/lds/QuantumRelativity/RelativityTrain/RelativityTrain.html
• Singh, S. (2005). Big Bang: The Origin of the Universe. New York, New York: Harper Perennial.

Light and water

• Minnaert, M. (1954). The nature of light and colour in the open air. New York, New York: Dover Publications.
• http://hyperphysics.phy-astr.gsu.edu/hbase/geoopt/refr.html

Wave-particle duality

• http://abyss.uoregon.edu/~js/21st_century_science/lectures/lec13.html