Unpolarized Light of Intensity $I _ { 0 }$ Passed Through an Ideal Polarizing Sheet with Its Polarizing Axis

Short Answer

Unpolarized light of intensity $I _ { 0 }$ passed through an ideal polarizing sheet with its polarizing axis at the 12 o'clock position and then through a second ideal sheet with its polarizing axis at the 1 o'clock position. What is the intensity of the emerging light in terms of $I _ { 0 }$ ?