Consider a sphere of radius a that is charged over its volume with a charge density p= and is situated in free space. the electric field intensity vector at a point whose radial distance from the sphere center is r is the same as e due to a point charge placed at the sphere center for the following range of values of r only: a-a

Light from two different sources are incident upon the same side of a polarizing filter. light from one source is polarized with total intensity ip, while light from the other source is unpolarized with total intensity iu. as you rotate the polarizing filter through 360 degrees, the intensity of the transmitted light on the other side varies by a factor of 9. what is the relative intensity of the initial polarized source to the unpolarized source, or ip/iu?