Question: One day, after pulling down your window shade, you notice that sunlight is passing through a pinhole in the shade and making a small patch

One day, after pulling down your window shade, you notice that sunlight is passing through a pinhole in the shade and making a small patch of light on the far wall. Having recently studied optics in your physics class, you’re not too surprised to see that the patch of light seems to be a circular diffraction pattern. It appears that the central maximum is about 1 cm across, and you estimate that the distance from the window shade to the wall is about 3 m. Estimate

(a) The average wavelength of the sunlight (in nm)

(b) The diameter of the pinhole (in mm).

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