Which statement is true about historical models of the solar system? 1.) The heliocentric model was the first model of the solar system.

2.)Astronomers developed questions from observations that the geocentric model could not answer.

3.)In the heliocentric model every astronomical body travels in perfect circles.

4.)Old explanations about the natural world are always wrong.

Unpolarized light of intensity i_0=750w/m^2 is incident upon two polarizers. after passing through both polarizers the intensity is i_2=280w/m^2. (a) what is the intensity of the light after it passes through the first polarizer in w/m^2? (b) write an equation for the angle between the polarizers in terms of the initial (i_0) and final (i_2) intensities. (c) find the angle between the polarizers in degrees.