Question: The angular distance between the center and the first minimum of a single-slit Fraunhofer diffraction pattern is called the half-angular breadth; write an expression for

The angular distance between the center and the first minimum of a single-slit Fraunhofer diffraction pattern is called the half-angular breadth; write an expression for it. Find the corresponding half-linear width when no focusing lens is present and the distance from the slit to the viewing screen is L. Notice that the half-linear width is also the distance between the successive minima.

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