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As a result, the wave theory of radiation explains how electromagnetic waves, consisting of light and other forms of radiation, travel through space at the finite speed of light, ~ 300,000 kms/s in a vacuum and slightly less in air or water. It is a colossally successful theory, filled with power to explain and predict the complex interactions between light and matter.9
9 Chaisson, McMillan. Astronomy Today. Volume II. The Solar System. 63. See also Bennet, Donahue, Schneider, Voit. The Cosmic Perspective. 6th Edition. 146-147.
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