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AP Physics 2
14.8 Double-Slit Interference and Diffraction Gratings
14.3 Boundary Behavior of Waves and Polarization
IntermediateMCQConceptual24k
A schematic setup showing monochromatic light incident from the left onto a barrier with two narrow slits labeled Slit 1 and Slit 2. Slit 1 has a vertical arrow indicating vertically polarized light passing through. Slit 2 has a small polarizing element attached to it, with a horizontal arrow indicating horizontally polarized light emerging from it. To the right of the barrier is a viewing screen labeled Screen. Light rays propagate from both slits toward a point on the screen. No other labels, lines, text, or axes appear.
Light passing through two slits with mutually perpendicular polarization directions.
A vertically polarized monochromatic laser beam of wavelength \(\lambda\) is incident on two narrow slits separated by a distance \(d\). A polarizing sheet is placed directly behind one of the slits, rotating the polarization direction of light passing through that slit by \(90^\circ\) to horizontal, while light passing through the other slit remains vertically polarized. The light from both slits travels to a viewing screen located far from the slits. Which of the following correctly describes the light pattern observed on the screen and provides the correct physical justification?

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