University of British Columbia
University of British Columbia: Single Slit Diffraction Pattern of Light
Explains single slit diffraction and models how to calculate different characteristics of the light waves.
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University of Tennessee Knoxville: Diffraction and Interference
Explains what diffraction and interference are, and what kinds of patterns are produced when light waves pass through a single slit, a double slit, or a diffraction grating. Includes three problems for students to try, with solutions...