Oscar’s family recently put solar panels on their roof to cut down on their use of electricity from the power company. How will alternative energy sources affect Earth’s atmosphere? A. They will increase levels of greenhouse gases in the atmosphere.
B. They will reduce levels of greenhouse gases in the atmosphere.
C. They will increase the use of fossil fuels for economic reasons.
D. They will reduce the amount of energy we consume.

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?