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AP Physics 2
14.3 Boundary Behavior of Waves and Polarization
AdvancedMCQMathematicalProportional Analysis17.1k
Schematic diagram of the liquid crystal display (LCD) pixel assembly.
Schematic diagram of the liquid crystal display (LCD) pixel assembly.
An unpolarized light beam of intensity \(I_0\) travels along the \(z\)-axis and enters a liquid crystal display (LCD) pixel assembly. The assembly consists of a linear polarizer with a vertical transmission axis, a liquid crystal layer, and a second linear polarizer (analyzer) with a horizontal transmission axis. In the absence of an electric field, the liquid crystal layer rotates the plane of polarization of the light passing through it by \(60^\circ\) relative to the vertical. When a control electric field is applied, the liquid crystal molecules reorient such that the layer rotates the plane of polarization by only \(45^\circ\) relative to the vertical. What is the ratio of the transmitted light intensity with the electric field applied (\(I_{\text{on}}\)) to the transmitted light intensity without the electric field (\(I_{\text{off}}\))?

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