Start with light that is initially polarized parallel to the x axis sent into a system of three polarizing sheets.

a. If we rotate the polarizing direction of the first sheet to 60^o counterclockwise, what is the ratio of its final intensity I₃ to its initial intensity I₀ as I₃/I₀ from what is shown?

b. If we rotate the polarizing direction of the first sheet to 90^o counterclockwise, what is the ratio of its final intensity I₃ to its initial intensity I₀ as I₃/I₀ from what is shown?

Answer are given as (I₃/I₀ (a); I₃/I₀(b))

answer choices:

0; cos^2(60)cos^2(?-60)cos^2(?-90)

0; 0.5cos^2(60)cos^2(?-60)

None of the above

-K -X I1 12 13