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 3 cm across, and you estimate that the distance from the window shade to the wall is about 5 m. estimate the average wavelength of the sunlight (in mm) and the diameter of the pinhole (in mm).