Our city is considering a program to spray insecticide to reduce the number of mosquitoes in the area. before they do, they want to find out if there are any health risks associated with this type of mass spraying. which group would be the best to advise them on this topic?

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?