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| | Thomas Young: The Double Slit Experiment |
 | | This is how Thomas Young speaking on November 24, 1803, to the Royal Society of London, began his description of the historic experiment. |
 | | His audience, an august gathering of notables in science, was steeped in Isaac Newton's belief that light is made of tiny bullet-like particles, because it is always observed (or so Newton thought) to travel in straight beams, in contrast to the ripple-spreading behavior which Christian Huygens had linked with wave motion. |
 | | Thomas Young, Experimental Demonstration of the General Law of the Interference of Light, "Philosophical Transactions of the Royal Society of London", vol 94 (1804) |
| www.juliantrubin.com /bigten/youngdoubleslit.html (1115 words) |
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