Question: Considering the previous problem, suppose we insert an opaque disk of radius R D at the center of the hole so that the unobstructed region

Considering the previous problem, suppose we insert an opaque disk of radius R_D at the center of the hole so that the unobstructed region is now an annulus. If R_D = 0.50 mm, determine the ratio of the irradiance at P now (I) to the irradiance without the screen in place (I_u).

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