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Question: 

Two polarizers are oriented at $48 ^\circ$ to each other and plane-polarized light is incident on them. If only 35% of the light gets through both of them, what was the initial polarization direction of the incident light?

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

Quick Answer: 

$28^\circ$

Giancoli 7th Edition, Chapter 24, Problem 71

(2:80)

Chapter 24, Problem 71 is solved.

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