Young's interference experiment is any one of a number of optical experiments described or performed at the beginning of the nineteenth century by Thomas Young to demonstrate the wave theory of light.
From a book published in 1807 relating lectures given by Young in 1802 to London's Royal Institution
Title-page of Young's Syllabus of a Course of Lectures on Natural and Experimental Philosophy (1802)
Double-slit experiment
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In modern physics, the double-slit experiment demonstrates that light and matter can exhibit behavior associated with both classical particles and classical waves. This type of experiment was first de
Young's interference experiment
…light. These experiments played a major role in the acceptance of the wave theory of light. One such experiment was the original version of the modern double-slit experiment. In the second half of the 17th century two hypotheses for the nature of light were discussed. Robert Hooke, Christiaan Huygens advocated a wave theory…
Same double-slit assembly (0.7 mm between slits); in top image, one slit is closed. In the single-slit image, a diffraction pattern (the faint spots on either side of the main band) forms due to the nonzero width of the slit. This diffraction pattern is also seen in the double-slit image, but with many smaller interference fringes.