Question

You must design a pair of slits for a demonstration in which the first maximum of the diffraction pattern sits at the same place as the 5th order maximum of the interference pattern. What is the ratio of the slit spacing over the slit width? Recall that the light intensity at the screen is the product of the double slit interference pattern that corresponds to the slit spacing, and the single slit diffraction pattern that corresponds to the slit width.

Answer 1

Here we apply concept of single slit diffraction and double slit interference pattern of Young's double slit experiment concept.

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Answer 2

Here we apply Young's double slit interference concept and Fraunhofer single slit diffraction.

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