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Question: 

Two polarizers are oriented at $72 ^\circ$ to one another. Unpolarized light falls on them. What fraction of the light intensity is transmitted?

Source: Giancoli, Douglas C., Physics: Principles with Applications, 7th Edition, 2014.

Quick Answer: 

4.8%

Giancoli 7th Edition, Chapter 24, Problem 60

(1:28)

Chapter 24, Problem 60 is solved.

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