Question

Unpolarized light with an intensity of $I_0=16\frac{W}{m^2}$ is incident on a pair of polarizers. The first polarizer has its transmission axis aligned at ${50}^{\circ }$ from the vertical. The second polarizer has its transmission axis aligned at ${20}^{\circ }$ from the vertical.

What is the intensity of the light when it emerges from the second polarizer?

• A. $4\frac{W}{m^2}$
• B. $8{\cos }^2{20}^{\circ }\frac{W}{m^2}$
• C. $6\frac{W}{m^2}$
• D. $12\frac{W}{m^2}$

Answer 1

The correct option is C $6\frac{W}{m^2}$

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