A Linearly Polarized Electromagnetic Wave Is Sent Through Two Sheets

question 29

Multiple Choice

A linearly polarized electromagnetic wave is sent through two sheets of polarizing material. The first sheet, A, is oriented so that its transmission axis makes an angle of 30° with respect to the incident electric field of the wave. The second sheet, B, is oriented so that its transmission axis makes an angle of 90° with the incident electric field of the wave. The incident beam has an electric field of peak magnitude E₀ and average intensity S₀.
-What is the average intensity of the wave after it passes through B?

• A)0.19S₀
• B)0.34S₀
• C)0.43S₀
• D)0.50S₀
• E)zero

---

Definitions:

Natural Resources

Materials or substances such as minerals, forests, water, and fertile land that occur in nature and can be used for economic gain.

Theodore Roosevelt

The 26th President of the United States (1901-1909), known for his energetic personality, range of interests and achievements, progressive reforms in business and labor, and vigorous foreign policy, including the Panama Canal construction.

Woodrow Wilson

The 28th President of the United States, serving from 1913 to 1921, who led the country through World War I and crafted the League of Nations concept.

World War I

A global conflict that lasted from 1914 to 1918, involving many of the world's great powers, and marked by trench warfare and massive casualties.