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AP Physics 2
14.8 Double-Slit Interference and Diffraction Gratings
IntermediateMCQProportional AnalysisConceptual25k
A Cartesian coordinate graph with horizontal axis labeled L and vertical axis labeled \Delta y. Both axes begin at the origin (0,0). Two straight lines originate from (0,0) and extend into the first quadrant. The first line, labeled Slide 1, is drawn as a solid straight line with a steep positive slope. The second line, labeled Slide 2, is drawn as a dashed straight line with a shallower positive slope below the line for Slide 1. No numerical ticks, gridlines, or other curves appear.
Fringe spacing \(\Delta y\) as a function of screen distance \(L\) for two different slides.
In an experiment, light from a single monochromatic laser of wavelength \(\lambda\) passes through a double slit and forms an interference pattern on a distant screen. The experiment is performed using Slide 1 and then repeated using Slide 2, each having a different slit separation. For each slide, the distance \(L\) between the slits and the screen is varied, and the adjacent bright fringe spacing \(\Delta y\) is measured, producing the linear graphs shown.

Which of the following statements correctly compares the two slides based on the graphical evidence?

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