christiaan huygens

Science Dictionary
Huygens   (hī'gənz, hoi'gěns)  Pronunciation Key 
Dutch physicist and astronomer who in 1655 discovered Saturn's rings and its fourth satellite, using a telescope he constructed with his brother. In 1657 he built the first pendulum clock. Huygens also proposed that light consists of transverse waves that vibrate up and down perpendicular to the direction in which the light travels. This theory, which explained some properties of light better than Newton's theory, was made public in 1690.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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WordNet
christiaan huygens

noun
Dutch physicist who first formulated the wave theory of light (1629-1695) [syn: Huygens
WordNet® 3.0, © 2006 by Princeton University.
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