Question

Suppose that when illuminated by a plane wave at normal incidence, an aperture diffracts into an
intensity pattern I(x, z) on a screen a long distance z away. We’ll ignore the y-direction for simplicity.
What is the effect on the intensity pattern if the incident wave makes a small angle with respect to the
x-axis? The answer should be reasonably obvious but you should prove your answer mathematically.

ordinary Fraunhofer di raction, but with an oblique plane wave source.

Answer 1