When two slits produce an interference pattern, and one slit is closed, then the interference pattern disappears. Why? As one-slit interference is still possible. What should be the measurements of each slit for this to occur? That is, that, starting with a double slit, closing one slit does not eliminate the interference pattern.
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3Does this answer your question? How can a single slit diffraction produce an interference pattern? – Farcher Feb 29 '24 at 09:05
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Note that single slit diffraction interference only works for light .... matter waves do not show single slit diffraction interference. – PhysicsDave Mar 01 '24 at 15:50