Translations:Interpretive processing/4/en

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Most familiar to us are water waves. Ancient Greek philosophers, many of whom were interested in music, hypothesized that a parallel exists between water waves and sound. It is said that by observing waves in the canals of his native Holland, Christiaan Huygens (1629-1695) could visualize the undulatory nature of light. It took well over a century for people to understand and accept Huygens’ theory of the wave nature of light. Today, we know that electromagnetic waves permeate through all the space in the universe.