All questions
AP Physics 2
14.3 Boundary Behavior of Waves and Polarization
AdvancedMCQMathematicalProportional Analysis17.1k
A horizontal dashed optical axis labeled z extends from left to right through three optical elements. On the far left, an incoming beam of unpolarized light represented by a thick horizontal arrow labeled I_0 travels along the z-axis toward the first element. The first element is a rectangular vertical plate labeled Polarizer 1 with double-headed vertical arrows indicating a vertical transmission axis. Next along the z-axis is a rectangular slab labeled Liquid Crystal Layer. On the far right is a rectangular vertical plate labeled Polarizer 2 (Analyzer) with double-headed horizontal arrows indicating a horizontal transmission axis. A light ray arrow continues through all three elements along the z-axis, exiting to the right labeled I_transmitted. No other labels, lines, text, or axes appear.
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 (\(I_{\text{off}}\))?

Log In to Continue

Accounts are free! Log in to try this question, see explanations, save progress, and more!

Tools for a 5