1. ~ a brief biographical sketch by ~ Carl J. Wenning
CHRISTIAAN HUYGENS
~ a brief biographical sketch by ~
Carl J. Wenning

2. Christiaan Huygens Dutch physicist and astronomer
Born: The Hague, April 14, 1629
Died: The Hague, June 8, 1695

3. Most notable accomplishments
Wrote the first book on probability
Discovered Titan and features on Mars, and resolved rings of Saturn
Noted non-ischronicity of the pendulum
Developed clock escapement with regulator

4. Other notable accomplishments
Huygen’s principle - every point on a primary wave front serves as the source of spherical secondary wavelets (thereby accounting for diffraction)