Unpolarized Light of Intensity I₀ Is Sent Through an Arrangement

question 60

Multiple Choice

Unpolarized light of intensity I₀ is sent through an arrangement of 4 polarizers. Each polarizer (after the first) is rotated 30° relative to the preceding one, so that the last polarizer is perpendicular to the first. What is the intensity transmitted by this system?

• A) 0.75 I₀
• B) 0.50 I₀
• C) 0.42 I₀
• D) 0.21 I₀
• E) 0

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A medical treatment involving electric currents passed through the brain, intentionally triggering a brief seizure, used to treat severe mental disorders.

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