Unpolarized light strikes a polarizing filter. It then passes through a second polarizer. The axis of the second polarizer is tilted $45°$ from the axis of the first. If the intensity of light emerging from the second polarizer is $45{\text{W/m}}^2$. what intensity does the light have as it strikes the first polarizer?

• A. ${11\text{W/m}}^2$
• B. $23{\text{W/m}}^2$
• C. $45{\text{W/m}}^2$
• D. $90{\text{W/m}}^2$
• E. $230{\text{W/m}}^2$
• F. $180{\text{W/m}}^2$